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Intermediate Geometry : Solid Geometry

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Example Questions

Example Question #221 : Solid Geometry

A triangular prism with an equilateral triangle base is placed on top of a rectangular prism with a square base as shown by the figure below.

Find the volume of the figure.

Possible Answers:

3637.84

3206.97

3582.53

3444.23

Correct answer:

3582.53

Explanation:

In order to find the volume of the figure, we will first need to find the volume of the rectangular and triangular prisms.

Recall how to find the volume for any prism:

$\text{Volume of Prism}=\text{Area of base}\times \text{height}$

First find the volume of the rectangular prism:

$\text{Volume of Rectangular Prism}=(10)(10)(25)=2500$

Next, find the volume of the triangular prism.

Notice that the length of the rectangular prism is the same as the side of the equilateral triangle that makes up one of the bases of the triangular prism.

Recall how to find the area of an equilateral triangle:

$\text{Area of Equilateral Triangle}=\frac{\sqrt3}{4}(\text{side})^2$

Plug in the given side to find the area of the triangle.

$\text{Area of Equilateral Triangle}=\frac{\sqrt3}{4}(10^2)=25\sqrt3$

Next, notice that the width of the rectangular prism is also the height of the triangular prism.

Now, find the volume of the triangular prism.

$\text{Volume of Triangular Prism}=25\sqrt3(25)=625\sqrt3$

To find the volume of the entire figure, add the individual volumes together.

$\text{Volume of Figure}=\text{Volume of Rectangular Prism}+\text{Volume of Triangular Prism}$

$\text{Volume of Figure}=2500+625\sqrt3=3582.53$

Make sure to round to places after the decimal.

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Example Question #86 : Prisms

A triangular prism with an equilateral triangle base is placed on top of a rectangular prism with a square base as shown by the figure below.

Find the volume of the figure.

Possible Answers:

10965.37

11203.64

12222.08

11739.24

Correct answer:

11739.24

Explanation:

In order to find the volume of the figure, we will first need to find the volume of the rectangular and triangular prisms.

Recall how to find the volume for any prism:

$\text{Volume of Prism}=\text{Area of base}\times \text{height}$

First find the volume of the rectangular prism:

$\text{Volume of Rectangular Prism}=(16)(16)(32)=8192$

Next, find the volume of the triangular prism.

Notice that the length of the rectangular prism is the same as the side of the equilateral triangle that makes up one of the bases of the triangular prism.

Recall how to find the area of an equilateral triangle:

$\text{Area of Equilateral Triangle}=\frac{\sqrt3}{4}(\text{side})^2$

Plug in the given side to find the area of the triangle.

$\text{Area of Equilateral Triangle}=\frac{\sqrt3}{4}(16^2)=64\sqrt3$

Next, notice that the width of the rectangular prism is also the height of the triangular prism.

Now, find the volume of the triangular prism.

$\text{Volume of Triangular Prism}=64\sqrt3(32)=2048\sqrt3$

To find the volume of the entire figure, add the individual volumes together.

$\text{Volume of Figure}=\text{Volume of Rectangular Prism}+\text{Volume of Triangular Prism}$

$\text{Volume of Figure}=8192+2048\sqrt3=11739.24$

Make sure to round to places after the decimal.

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Example Question #87 : Prisms

A triangular prism with an equilateral triangle base is placed on top of a rectangular prism with a square base as shown by the figure below.

Find the volume of the figure.

Possible Answers:

663.34

670.65

679.08

610.52

Correct answer:

670.65

Explanation:

In order to find the volume of the figure, we will first need to find the volume of the rectangular and triangular prisms.

Recall how to find the volume for any prism:

$\text{Volume of Prism}=\text{Area of base}\times \text{height}$

First find the volume of the rectangular prism:

$\text{Volume of Rectangular Prism}=(6)(6)(13)=468$

Next, find the volume of the triangular prism.

Notice that the length of the rectangular prism is the same as the side of the equilateral triangle that makes up one of the bases of the triangular prism.

Recall how to find the area of an equilateral triangle:

$\text{Area of Equilateral Triangle}=\frac{\sqrt3}{4}(\text{side})^2$

Plug in the given side to find the area of the triangle.

$\text{Area of Equilateral Triangle}=\frac{\sqrt3}{4}(6^2)=9\sqrt3$

Next, notice that the width of the rectangular prism is also the height of the triangular prism.

Now, find the volume of the triangular prism.

$\text{Volume of Triangular Prism}=9\sqrt3(13)=117\sqrt3$

To find the volume of the entire figure, add the individual volumes together.

$\text{Volume of Figure}=\text{Volume of Rectangular Prism}+\text{Volume of Triangular Prism}$

$\text{Volume of Figure}=468+117\sqrt3=670.65$

Make sure to round to places after the decimal.

Report an Error

Example Question #224 : Solid Geometry

A triangular prism with an equilateral triangle base is placed on top of a rectangular prism with a square base as shown by the figure below.

Find the volume of the figure.

Possible Answers:

697.03

741.48

702.18

731.29

Correct answer:

702.18

Explanation:

In order to find the volume of the figure, we will first need to find the volume of the rectangular and triangular prisms.

Recall how to find the volume for any prism:

$\text{Volume of Prism}=\text{Area of base}\times \text{height}$

First find the volume of the rectangular prism:

$\text{Volume of Rectangular Prism}=(7)(7)(10)=490$

Next, find the volume of the triangular prism.

Notice that the length of the rectangular prism is the same as the side of the equilateral triangle that makes up one of the bases of the triangular prism.

Recall how to find the area of an equilateral triangle:

$\text{Area of Equilateral Triangle}=\frac{\sqrt3}{4}(\text{side})^2$

Plug in the given side to find the area of the triangle.

$\text{Area of Equilateral Triangle}=\frac{\sqrt3}{4}(7^2)=\frac{49\sqrt3}{4}$

Next, notice that the width of the rectangular prism is also the height of the triangular prism.

Now, find the volume of the triangular prism.

$\text{Volume of Triangular Prism}=\frac{49\sqrt3}{4}(10)=\frac{490\sqrt3}{4}$

To find the volume of the entire figure, add the individual volumes together.

$\text{Volume of Figure}=\text{Volume of Rectangular Prism}+\text{Volume of Triangular Prism}$

$\text{Volume of Figure}=490+\frac{490\sqrt3}{4}=702.18$

Make sure to round to places after the decimal.

Report an Error

Example Question #91 : Prisms

A triangular prism with an equilateral triangle base is placed on top of a rectangular prism with a square base as shown by the figure below.

Find the volume of the figure.

Possible Answers:

1115.27

1295.67

1236.09

1276.81

Correct answer:

1276.81

Explanation:

In order to find the volume of the figure, we will first need to find the volume of the rectangular and triangular prisms.

Recall how to find the volume for any prism:

$\text{Volume of Prism}=\text{Area of base}\times \text{height}$

First find the volume of the rectangular prism:

$\text{Volume of Rectangular Prism}=(9)(9)(11)=891$

Next, find the volume of the triangular prism.

Notice that the length of the rectangular prism is the same as the side of the equilateral triangle that makes up one of the bases of the triangular prism.

Recall how to find the area of an equilateral triangle:

$\text{Area of Equilateral Triangle}=\frac{\sqrt3}{4}(\text{side})^2$

Plug in the given side to find the area of the triangle.

$\text{Area of Equilateral Triangle}=\frac{\sqrt3}{4}(9^2)=\frac{81\sqrt3}{4}$

Next, notice that the width of the rectangular prism is also the height of the triangular prism.

Now, find the volume of the triangular prism.

$\text{Volume of Triangular Prism}=\frac{81\sqrt3}{4}(11)=\frac{891\sqrt3}{4}$

To find the volume of the entire figure, add the individual volumes together.

$\text{Volume of Figure}=\text{Volume of Rectangular Prism}+\text{Volume of Triangular Prism}$

$\text{Volume of Figure}=891+\frac{891\sqrt3}{4}=1276.81$

Make sure to round to places after the decimal.

Report an Error

Example Question #92 : Prisms

A triangular prism with an equilateral triangle base is placed on top of a rectangular prism with a square base as shown by the figure below.

Find the volume of the figure.

Possible Answers:

58445.67

53737.98

59747.38

63838.92

Correct answer:

53737.98

Explanation:

In order to find the volume of the figure, we will first need to find the volume of the rectangular and triangular prisms.

Recall how to find the volume for any prism:

$\text{Volume of Prism}=\text{Area of base}\times \text{height}$

First find the volume of the rectangular prism:

$\text{Volume of Rectangular Prism}=(25)(25)(60)=37500$

Next, find the volume of the triangular prism.

Notice that the length of the rectangular prism is the same as the side of the equilateral triangle that makes up one of the bases of the triangular prism.

Recall how to find the area of an equilateral triangle:

$\text{Area of Equilateral Triangle}=\frac{\sqrt3}{4}(\text{side})^2$

Plug in the given side to find the area of the triangle.

$\text{Area of Equilateral Triangle}=\frac{\sqrt3}{25}(7^2)=\frac{625\sqrt3}{4}$

Next, notice that the width of the rectangular prism is also the height of the triangular prism.

Now, find the volume of the triangular prism.

$\text{Volume of Triangular Prism}=\frac{625\sqrt3}{4}(60)=9375\sqrt3$

To find the volume of the entire figure, add the individual volumes together.

$\text{Volume of Figure}=\text{Volume of Rectangular Prism}+\text{Volume of Triangular Prism}$

$\text{Volume of Figure}=37500+9375\sqrt3=53737.98$

Make sure to round to places after the decimal.

Report an Error

Example Question #93 : Prisms

A triangular prism with an equilateral triangle base is placed on top of a rectangular prism with a square base, as shown by the figure below.

Find the volume of the figure.

Possible Answers:

926.38

930.88

1909.06

1834.26

Correct answer:

1834.26

Explanation:

In order to find the volume of the figure, we will first need to find the volume of the rectangular and triangular prisms.

Recall how to find the volume for any prism:

$\text{Volume of Prism}=\text{Area of base}\times \text{height}$

First find the volume of the rectangular prism:

$\text{Volume of Rectangular Prism}=(8)(8)(20)=1280$

Next, find the volume of the triangular prism.

Notice that the length of the rectangular prism is the same as the side of the equilateral triangle that makes up one of the bases of the triangular prism.

Recall how to find the area of an equilateral triangle:

$\text{Area of Equilateral Triangle}=\frac{\sqrt3}{4}(\text{side})^2$

Plug in the given side to find the area of the triangle.

$\text{Area of Equilateral Triangle}=\frac{\sqrt3}{4}(8^2)=16\sqrt3$

Next, notice that the width of the rectangular prism is also the height of the triangular prism.

Now, find the volume of the triangular prism.

$\text{Volume of Triangular Prism}=16\sqrt3(10)=160\sqrt3$

To find the volume of the entire figure, add the individual volumes together.

$\text{Volume of Figure}=\text{Volume of Rectangular Prism}+\text{Volume of Triangular Prism}$

$\text{Volume of Figure}=1280+160\sqrt3=1834.26$

Make sure to round to places after the decimal.

Report an Error

Example Question #94 : Prisms

Pyramid

The above figure shows a square pyramid inscribed inside a cube. The pyramid has volume 100. Give the volume of the cube.

Possible Answers:

200

300

$233\frac{1}{3}$

$333\frac{1}{3}$

250

Correct answer:

300

Explanation:

Let be the length of one side of the cube. Then the base of the pyramid is a square with sidelength , and its area is

$B = s^{2}$ .

The volume of a pyramid is one third the product of its height and the area of its base. The height of the pyramid is , so the volume is

$V_{1} = \frac{1}{3} Bh = \frac{1}{3} s^{2} \cdot s = \frac{1}{3} s^{3}$

The volume of the cube is $V_{2} = s^{3}$ , so

$V_{1} = \frac{1}{3} V_{2}$

or, equivalently,

$3 \cdot V_{1} =3 \cdot \frac{1}{3} V_{2}$

$V_{2} = 3 \cdot V_{1}$

That is, the volume of the cube is three times that of the pyramid, and, since the pyramid has volume 100, the volume of the cube is $3 \cdot 100 =300$ .

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Example Question #1 : How To Find The Volume Of A Prism

A rectangular box has two sides with the following lengths:

3$ cm$ and 4 $ cm$

If it possesses a volume of $84$ cm$^{3}$ , what is the area of its largest side?

Possible Answers:

Correct answer:

Explanation:

The volume of a rectangular prism is found using the following formula:

$V=l\times w\times h$

If we substitute our known values, then we can solve for the missing side.

$84=3\times 4\times x$

84=12x

Divide both sides of the equation by 12.

$\frac{84}{12}=\frac{12x}{12}$

x=7

We now know that the missing length equals 7 centimeters.

This means that the box can have sides with the following dimensions: 3cm by 4cm; 7cm by 3cm; or 7cm by 4cm. The greatest area of one side belongs to the one that is 7cm by 4cm.

$A=l\times w$

$A=4\times 7$

A=28

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Example Question #1 : How To Find The Diagonal Of A Prism

What is the length of the diagonal of a rectangular box with the dimensions of $3\; cm\times 4\; cm\times 12 \; cm$ ?

Possible Answers:

$17\; cm$

$19\; cm$

$13\; cm$

$11\; cm$

$15\; cm$

Correct answer:

$13\; cm$

Explanation:

To solve this problem we need an extension of the Pythagorean Theorem:

$d^{2}=x^{2}+y^{2}+z^{2}$

So the equation to solve becomes $d^{2}=3^{2}+4^{2}+12^{2}=9+16+144=169$

So the distance of the diagonal is $13\; cm$ .

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Intermediate Geometry : Solid Geometry

Study concepts, example questions & explanations for Intermediate Geometry

All Intermediate Geometry Resources

Example Questions

Example Question #221 : Solid Geometry

Example Question #86 : Prisms

Example Question #87 : Prisms

Example Question #224 : Solid Geometry

Example Question #91 : Prisms

Example Question #92 : Prisms

Example Question #93 : Prisms

Example Question #94 : Prisms

Example Question #1 : How To Find The Volume Of A Prism

Example Question #1 : How To Find The Diagonal Of A Prism

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