Intermediate Geometry : Intermediate Geometry

Study concepts, example questions & explanations for Intermediate Geometry

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Example Questions

Example Question #10 : How To Find The Surface Area Of A Prism

Find the surface area of the regular hexagonal prism.

5

Possible Answers:

\displaystyle 411.27

\displaystyle 447.83

\displaystyle 435.63

\displaystyle 429.90

Correct answer:

\displaystyle 429.90

Explanation:

13

In order to find the surface area, you will need to add up the areas of each face of the prism.

This hexagonal prism has two regular hexagons as its bases.

Recall how to find the area of a regular hexagon:

\displaystyle \text{Area of Regular Hexagon}=\frac{3\sqrt3}{2}(\text{side}^2)

Now, since we have two hexagons, we can multiply the area by \displaystyle 2 to get the area of both bases.

\displaystyle \text{Area of Bases}=3\sqrt3(\text{side})^2

Next, this prism has \displaystyle 6 rectangles that make up its sides.

Recall how to find the area of a rectangle:

\displaystyle \text{Area of Rectangle}=\text{length}\times\text{width}

In this prism, the length is also the side of the hexagon, and the width of the rectangle is the height of the prism.

Now, multiply the area of the rectangle by \displaystyle 6 to find the total area of all of the sides of the prism.

\displaystyle \text{Area of Prism Sides}=6(\text{side})(\text{height})

Add together the area of the sides and of the bases to find the surface area of the prism.

\displaystyle \text{Surface Area of Prism}=\text{Area of Bases}+\text{Area of Sides}

\displaystyle \text{Surface Area of Prism}=3\sqrt3(\text{side})^2+6(\text{side})(\text{height})

Plug in the given values to find the surface area of the prism.

\displaystyle \text{Surface Area of Prism}=3\sqrt3(5)^2+6(5)(10)=429.90

Make sure to round to \displaystyle 2 places after the decimal.

Example Question #144 : Solid Geometry

Find the surface area of the regular hexagonal prism.

7

Possible Answers:

\displaystyle 862.24

\displaystyle 842.61

\displaystyle 845.59

\displaystyle 839.07

Correct answer:

\displaystyle 842.61

Explanation:

13

In order to find the surface area, you will need to add up the areas of each face of the prism.

This hexagonal prism has two regular hexagons as its bases.

Recall how to find the area of a regular hexagon:

\displaystyle \text{Area of Regular Hexagon}=\frac{3\sqrt3}{2}(\text{side}^2)

Now, since we have two hexagons, we can multiply the area by \displaystyle 2 to get the area of both bases.

\displaystyle \text{Area of Bases}=3\sqrt3(\text{side})^2

Next, this prism has \displaystyle 6 rectangles that make up its sides.

Recall how to find the area of a rectangle:

\displaystyle \text{Area of Rectangle}=\text{length}\times\text{width}

In this prism, the length is also the side of the hexagon, and the width of the rectangle is the height of the prism.

Now, multiply the area of the rectangle by \displaystyle 6 to find the total area of all of the sides of the prism.

\displaystyle \text{Area of Prism Sides}=6(\text{side})(\text{height})

Add together the area of the sides and of the bases to find the surface area of the prism.

\displaystyle \text{Surface Area of Prism}=\text{Area of Bases}+\text{Area of Sides}

\displaystyle \text{Surface Area of Prism}=3\sqrt3(\text{side})^2+6(\text{side})(\text{height})

Plug in the given values to find the surface area of the prism.

\displaystyle \text{Surface Area of Prism}=3\sqrt3(7)^2+6(7)(14)=842.61

Make sure to round to \displaystyle 2 places after the decimal.

Example Question #11 : How To Find The Surface Area Of A Prism

Find the surface area of the regular hexagonal prism.

8

Possible Answers:

\displaystyle 1828.25

\displaystyle 1258.06

\displaystyle 1159.97

\displaystyle 1406.37

Correct answer:

\displaystyle 1828.25

Explanation:

13

In order to find the surface area, you will need to add up the areas of each face of the prism.

This hexagonal prism has two regular hexagons as its bases.

Recall how to find the area of a regular hexagon:

\displaystyle \text{Area of Regular Hexagon}=\frac{3\sqrt3}{2}(\text{side}^2)

Now, since we have two hexagons, we can multiply the area by \displaystyle 2 to get the area of both bases.

\displaystyle \text{Area of Bases}=3\sqrt3(\text{side})^2

Next, this prism has \displaystyle 6 rectangles that make up its sides.

Recall how to find the area of a rectangle:

\displaystyle \text{Area of Rectangle}=\text{length}\times\text{width}

In this prism, the length is also the side of the hexagon, and the width of the rectangle is the height of the prism.

Now, multiply the area of the rectangle by \displaystyle 6 to find the total area of all of the sides of the prism.

\displaystyle \text{Area of Prism Sides}=6(\text{side})(\text{height})

Add together the area of the sides and of the bases to find the surface area of the prism.

\displaystyle \text{Surface Area of Prism}=\text{Area of Bases}+\text{Area of Sides}

\displaystyle \text{Surface Area of Prism}=3\sqrt3(\text{side})^2+6(\text{side})(\text{height})

Plug in the given values to find the surface area of the prism.

\displaystyle \text{Surface Area of Prism}=3\sqrt3(12)^2+6(12)(15)=1828.25

Make sure to round to \displaystyle 2 places after the decimal.

Example Question #12 : How To Find The Surface Area Of A Prism

Find the surface area of the regular hexagonal prism.

9

Possible Answers:

\displaystyle 2197.80

\displaystyle 2285.69

\displaystyle 2204.15

\displaystyle 2159.63

Correct answer:

\displaystyle 2204.15

Explanation:

13

In order to find the surface area, you will need to add up the areas of each face of the prism.

This hexagonal prism has two regular hexagons as its bases.

Recall how to find the area of a regular hexagon:

\displaystyle \text{Area of Regular Hexagon}=\frac{3\sqrt3}{2}(\text{side}^2)

Now, since we have two hexagons, we can multiply the area by \displaystyle 2 to get the area of both bases.

\displaystyle \text{Area of Bases}=3\sqrt3(\text{side})^2

Next, this prism has \displaystyle 6 rectangles that make up its sides.

Recall how to find the area of a rectangle:

\displaystyle \text{Area of Rectangle}=\text{length}\times\text{width}

In this prism, the length is also the side of the hexagon, and the width of the rectangle is the height of the prism.

Now, multiply the area of the rectangle by \displaystyle 6 to find the total area of all of the sides of the prism.

\displaystyle \text{Area of Prism Sides}=6(\text{side})(\text{height})

Add together the area of the sides and of the bases to find the surface area of the prism.

\displaystyle \text{Surface Area of Prism}=\text{Area of Bases}+\text{Area of Sides}

\displaystyle \text{Surface Area of Prism}=3\sqrt3(\text{side})^2+6(\text{side})(\text{height})

Plug in the given values to find the surface area of the prism.

\displaystyle \text{Surface Area of Prism}=3\sqrt3(13)^2+6(13)(17)=2204.15

Make sure to round to \displaystyle 2 places after the decimal.

Example Question #13 : How To Find The Surface Area Of A Prism

Find the surface area of the regular hexagonal prism.

10

Possible Answers:

\displaystyle 620.39

\displaystyle 679.34

\displaystyle 655.06

\displaystyle 648.52

Correct answer:

\displaystyle 655.06

Explanation:

13

In order to find the surface area, you will need to add up the areas of each face of the prism.

This hexagonal prism has two regular hexagons as its bases.

Recall how to find the area of a regular hexagon:

\displaystyle \text{Area of Regular Hexagon}=\frac{3\sqrt3}{2}(\text{side}^2)

Now, since we have two hexagons, we can multiply the area by \displaystyle 2 to get the area of both bases.

\displaystyle \text{Area of Bases}=3\sqrt3(\text{side})^2

Next, this prism has \displaystyle 6 rectangles that make up its sides.

Recall how to find the area of a rectangle:

\displaystyle \text{Area of Rectangle}=\text{length}\times\text{width}

In this prism, the length is also the side of the hexagon, and the width of the rectangle is the height of the prism.

Now, multiply the area of the rectangle by \displaystyle 6 to find the total area of all of the sides of the prism.

\displaystyle \text{Area of Prism Sides}=6(\text{side})(\text{height})

Add together the area of the sides and of the bases to find the surface area of the prism.

\displaystyle \text{Surface Area of Prism}=\text{Area of Bases}+\text{Area of Sides}

\displaystyle \text{Surface Area of Prism}=3\sqrt3(\text{side})^2+6(\text{side})(\text{height})

Plug in the given values to find the surface area of the prism.

\displaystyle \text{Surface Area of Prism}=3\sqrt3(6)^2+6(6)(13)=655.06

Make sure to round to \displaystyle 2 places after the decimal.

Example Question #21 : Prisms

Find the surface area of the regular hexagonal prism.

11

Possible Answers:

\displaystyle 288.82

\displaystyle 297.45

\displaystyle 299.14

\displaystyle 301.68

Correct answer:

\displaystyle 299.14

Explanation:

13

In order to find the surface area, you will need to add up the areas of each face of the prism.

This hexagonal prism has two regular hexagons as its bases.

Recall how to find the area of a regular hexagon:

\displaystyle \text{Area of Regular Hexagon}=\frac{3\sqrt3}{2}(\text{side}^2)

Now, since we have two hexagons, we can multiply the area by \displaystyle 2 to get the area of both bases.

\displaystyle \text{Area of Bases}=3\sqrt3(\text{side})^2

Next, this prism has \displaystyle 6 rectangles that make up its sides.

Recall how to find the area of a rectangle:

\displaystyle \text{Area of Rectangle}=\text{length}\times\text{width}

In this prism, the length is also the side of the hexagon, and the width of the rectangle is the height of the prism.

Now, multiply the area of the rectangle by \displaystyle 6 to find the total area of all of the sides of the prism.

\displaystyle \text{Area of Prism Sides}=6(\text{side})(\text{height})

Add together the area of the sides and of the bases to find the surface area of the prism.

\displaystyle \text{Surface Area of Prism}=\text{Area of Bases}+\text{Area of Sides}

\displaystyle \text{Surface Area of Prism}=3\sqrt3(\text{side})^2+6(\text{side})(\text{height})

Plug in the given values to find the surface area of the prism.

\displaystyle \text{Surface Area of Prism}=3\sqrt3(4)^2+6(4)(9)=299.14

Make sure to round to \displaystyle 2 places after the decimal.

Example Question #22 : Prisms

Find the surface area of the regular hexagonal prism.

12

Possible Answers:

\displaystyle 5596.87

\displaystyle 5698.30

\displaystyle 5432.62

\displaystyle 5678.46

Correct answer:

\displaystyle 5678.46

Explanation:

13

In order to find the surface area, you will need to add up the areas of each face of the prism.

This hexagonal prism has two regular hexagons as its bases.

Recall how to find the area of a regular hexagon:

\displaystyle \text{Area of Regular Hexagon}=\frac{3\sqrt3}{2}(\text{side}^2)

Now, since we have two hexagons, we can multiply the area by \displaystyle 2 to get the area of both bases.

\displaystyle \text{Area of Bases}=3\sqrt3(\text{side})^2

Next, this prism has \displaystyle 6 rectangles that make up its sides.

Recall how to find the area of a rectangle:

\displaystyle \text{Area of Rectangle}=\text{length}\times\text{width}

In this prism, the length is also the side of the hexagon, and the width of the rectangle is the height of the prism.

Now, multiply the area of the rectangle by \displaystyle 6 to find the total area of all of the sides of the prism.

\displaystyle \text{Area of Prism Sides}=6(\text{side})(\text{height})

Add together the area of the sides and of the bases to find the surface area of the prism.

\displaystyle \text{Surface Area of Prism}=\text{Area of Bases}+\text{Area of Sides}

\displaystyle \text{Surface Area of Prism}=3\sqrt3(\text{side})^2+6(\text{side})(\text{height})

Plug in the given values to find the surface area of the prism.

\displaystyle \text{Surface Area of Prism}=3\sqrt3(20)^2+6(20)(30)=5678.46

Make sure to round to \displaystyle 2 places after the decimal.

Example Question #23 : Prisms

Find the surface area of the regular hexagonal prism.

6

Possible Answers:

\displaystyle 92.78

\displaystyle 90.92

\displaystyle 94.06

\displaystyle 95.39

Correct answer:

\displaystyle 92.78

Explanation:

13

In order to find the surface area, you will need to add up the areas of each face of the prism.

This hexagonal prism has two regular hexagons as its bases.

Recall how to find the area of a regular hexagon:

\displaystyle \text{Area of Regular Hexagon}=\frac{3\sqrt3}{2}(\text{side}^2)

Now, since we have two hexagons, we can multiply the area by \displaystyle 2 to get the area of both bases.

\displaystyle \text{Area of Bases}=3\sqrt3(\text{side})^2

Next, this prism has \displaystyle 6 rectangles that make up its sides.

Recall how to find the area of a rectangle:

\displaystyle \text{Area of Rectangle}=\text{length}\times\text{width}

In this prism, the length is also the side of the hexagon, and the width of the rectangle is the height of the prism.

Now, multiply the area of the rectangle by \displaystyle 6 to find the total area of all of the sides of the prism.

\displaystyle \text{Area of Prism Sides}=6(\text{side})(\text{height})

Add together the area of the sides and of the bases to find the surface area of the prism.

\displaystyle \text{Surface Area of Prism}=\text{Area of Bases}+\text{Area of Sides}

\displaystyle \text{Surface Area of Prism}=3\sqrt3(\text{side})^2+6(\text{side})(\text{height})

Plug in the given values to find the surface area of the prism.

\displaystyle \text{Surface Area of Prism}=3\sqrt3(2)^2+6(2)(6)=92.78

Make sure to round to \displaystyle 2 places after the decimal.

Example Question #24 : Prisms

Find the surface area of the regular hexagonal prism.

1

Possible Answers:

\displaystyle 2236.09

\displaystyle 3667.88

\displaystyle 3596.62

\displaystyle 4275.55

Correct answer:

\displaystyle 4275.55

Explanation:

13

In order to find the surface area, you will need to add up the areas of each face of the prism.

This hexagonal prism has two regular hexagons as its bases.

Recall how to find the area of a regular hexagon:

\displaystyle \text{Area of Regular Hexagon}=\frac{3\sqrt3}{2}(\text{side}^2)

Now, since we have two hexagons, we can multiply the area by \displaystyle 2 to get the area of both bases.

\displaystyle \text{Area of Bases}=3\sqrt3(\text{side})^2

Next, this prism has \displaystyle 6 rectangles that make up its sides.

Recall how to find the area of a rectangle:

\displaystyle \text{Area of Rectangle}=\text{length}\times\text{width}

In this prism, the length is also the side of the hexagon, and the width of the rectangle is the height of the prism.

Now, multiply the area of the rectangle by \displaystyle 6 to find the total area of all of the sides of the prism.

\displaystyle \text{Area of Prism Sides}=6(\text{side})(\text{height})

Add together the area of the sides and of the bases to find the surface area of the prism.

\displaystyle \text{Surface Area of Prism}=\text{Area of Bases}+\text{Area of Sides}

\displaystyle \text{Surface Area of Prism}=3\sqrt3(\text{side})^2+6(\text{side})(\text{height})

Plug in the given values to find the surface area of the prism.

\displaystyle \text{Surface Area of Prism}=3\sqrt3(18)^2+6(18)(24)=4275.55

Make sure to round to \displaystyle 2 places after the decimal.

Example Question #151 : Solid Geometry

A prism with a square base has a height of \displaystyle 4 feet.

If the edge of the base is \displaystyle 2 feet, what is the volume of the prism?

Possible Answers:

\displaystyle 6\, ft^3

\displaystyle 16\, ft^3

\displaystyle 4\, ft^3

\displaystyle 8\, ft^3

Correct answer:

\displaystyle 16\, ft^3

Explanation:

The volume of a prism is given as

\displaystyle V = Bh

where

B = Area of the base

and

h = height of the prism.

Because the base is a square, we have

\displaystyle B = s^2 = 2^2 = 4

So plugging in the value of B that we found and h that was given in the problem we get the volume to be the following.

\displaystyle V = 4\cdot4 = 16\,ft^3

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