Basic Geometry : Quadrilaterals

Study concepts, example questions & explanations for Basic Geometry

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Example Questions

Example Question #101 : Rectangles

A rectangle has an area of , and a length of . Find the width in inches. 

Possible Answers:

Correct answer:

Explanation:

By using the formula for area, which is..:

..we plug in the numbers given. This gives us

Example Question #101 : Quadrilaterals

Find the length of a recangle given area is 10 and width is 2.

Possible Answers:

Correct answer:

Explanation:

To solve, simply use the formula for the area of a rectangle and solve for length.

Example Question #103 : Rectangles

 

A checkerboard has an area of and one of the sides has a length of . What is the length of the other side of the board?

Possible Answers:

Correct answer:

Explanation:

We can use the formula for the area of a rectangle to find the length of the side with the information provided:

Example Question #104 : Rectangles

 

If a graham cracker has a width of and an area of , what would be the length of the cracker?

Possible Answers:

Correct answer:

Explanation:

We can solve for the missing length using the formula for area of a rectangle:

 

Example Question #105 : Rectangles

A rectangle has a width of 5 meters. Its length is 2.5 times the width. What is the length of the long side and the total area of this rectangle?

Possible Answers:

None of these.

Correct answer:

Explanation:

"2.5 times the width" is equivalent to 2.5w. The length of the long side is .

The area is 

Example Question #106 : Rectangles

A rectangle has a perimeter of . Its width is 5 in. What is the length of one long side?

Possible Answers:

None of these.

Correct answer:

Explanation:

The perimeter of a rectangle can be found with .

Fill in the information given, and solve for l:

Example Question #107 : Rectangles

Brady wants create a garage with an area of 2000 square feet. He needs the garage to be 50 feet long to fit all of his equipment. How wide will the garage be?

Possible Answers:

None of the answers given are correct

Correct answer:

Explanation:

Since we have the area, and we have the length, we use the area of a rectangle formula to find the missing side length.

divide both sides by 50 to get the variable by itself

 

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

A rectangle has a length of 12 in and a width of 5 in.  What is the diagonal of the rectangle?

Possible Answers:

Correct answer:

Explanation:

To find the diagonal we use the Pythagorean Theorem:

where = hypotenuse

or

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

One side of a rectangle is 7 inches and another is 9 inches.  How many inches long is the rectangle's diagonal?

Possible Answers:

Correct answer:

Explanation:

You can find the diagonal of a rectangle if you have the width and the height. The diagonal equals the square root of the width squared plus the height squared.

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

Figure1

Find the length of the diagonal.

Possible Answers:

Correct answer:

Explanation:

The rectangle can be cut into two equal right triangles, where the hypotenuse of both is the rectangle's diagonal.

Use the Pythagorean Theorem to find the hypotenuse:

, where a and b are the legs and c is the hypotenuse

 

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