ACT Math : Plane Geometry

Study concepts, example questions & explanations for ACT Math

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Example Questions

Example Question #7 : How To Find The Length Of The Side Of A Kite

Kite vt act

Using the kite shown above, find the length of side 

Possible Answers:

Correct answer:

Explanation:

A kite must have two sets of congruent adjacent sides. This question provides the length for one set of congruent adjacent sides, thus the two remaining sides must be congruent to each other. Since, this problem also provides the perimeter measurement of the kite, find the difference between the perimeter and the sum of the congruent adjacent sides provided.    

The solution is:

, where  one of the two missing sides. 




Since the remaining two sides have a total length of  ft, side  must be  

Example Question #8 : How To Find The Length Of The Side Of A Kite

A kite has two adjacent sides both with a measurement of . The perimeter of the kite is . Find the length of one of the remaining two sides.   

Possible Answers:

Correct answer:

Explanation:

A kite must have two sets of congruent adjacent sides. This question provides the length for one set of congruent adjacent sides, thus the two remaining sides must be congruent to each other. Since, this problem also provides the perimeter measurement of the kite, find the difference between the perimeter and the sum of the congruent adjacent sides provided. Then divide that remaining difference in half, because each of the two sides must have the same length.   

The solution is:

, where  one of the two missing sides. 





Example Question #9 : How To Find The Length Of The Side Of A Kite

A kite has two adjacent sides both with a measurement of . The perimeter of the kite is . Find the length of the sum of the remaining two sides.

Possible Answers:

Correct answer:

Explanation:

A kite must have two sets of congruent adjacent sides. This question provides the length for one set of congruent adjacent sides, thus the two remaining sides must be congruent to each other. Since, this problem also provides the perimeter measurement of the kite, find the difference between the perimeter and the sum of the congruent adjacent sides provided.    

The solution is:

, where  one of the two missing sides. 



Example Question #10 : How To Find The Length Of The Side Of A Kite

A kite has two adjacent sides both with a measurement of . The perimeter of the kite is . Find the length of one of the remaining two sides.

Possible Answers:

Correct answer:

Explanation:

A kite must have two sets of congruent adjacent sides. This question provides the length for one set of congruent adjacent sides, thus the two remaining sides must be congruent to each other. Since, this problem also provides the perimeter measurement of the kite, find the difference between the perimeter and the sum of the congruent adjacent sides provided. Then divide that remaining difference in half, because each of the two sides must have the same length.   

The solution is:

, where  one of the two missing sides. 





Example Question #31 : Kites

A kite has two adjacent sides both with a measurement of . The perimeter of the kite is . Find the length of the sum of the remaining two sides.

Possible Answers:

Correct answer:

Explanation:

This question provides the length for one set of congruent adjacent sides, thus the two remaining sides must be congruent to each other. Since, this problem also provides the perimeter measurement of the kite, find the difference between the perimeter and the sum of the congruent adjacent sides provided.    

The solution is:

, where  one of the two missing sides. 



Example Question #32 : Kites

A kite has two adjacent sides both with a measurement of . The perimeter of the kite is . Find the length of one of the remaining two sides.

Possible Answers:

 

Correct answer:

Explanation:

A kite must have two sets of congruent adjacent sides. This question provides the length for one set of congruent adjacent sides, thus the two remaining sides must be congruent to each other. Since, this problem also provides the perimeter measurement of the kite, find the difference between the perimeter and the sum of the congruent adjacent sides provided. Then divide that remaining difference in half, because each of the two sides must have the same length.  

 

The solution is:

, where  one of the two missing sides. 





Example Question #1 : How To Find The Perimeter Of Kite

A kite has two shorter sides and two longer sides. Each of the shorter sides has a length of 19 and each of the longer sides has a length of 25. What is the perimeter of the kite?

Possible Answers:

Correct answer:

Explanation:

Remember that a kite has two adjacent sets of shorter sides as well as two adjacent sets of longer sides.

Use the formula for perimeter of a kite:

Where  is the perimeter,  is the length of the shorter sides, and  is the length of the longer sides.

Example Question #1 : How To Find The Perimeter Of Kite

If the short side of a kite has a length of , and the long side of a kite has a length of , what is the perimeter of the kite?

Possible Answers:

Correct answer:

Explanation:

Write the formula to find the perimeter of the kite.

Substitute the lengths and solve for the perimeter.

Example Question #42 : Quadrilaterals

A kite has a side length of  and another side length of . Find the perimeter of the kite.

Possible Answers:

Correct answer:

Explanation:

By definition a kite must have two sets of equivalent sides. Since we know that this kite has a side length of  and another side with a length of , each of these two sides must have one equivalent side. Therefore, the perimeter of this kite can be found by applying the formula:

 





Note: the correct solution can also be found by: 



The original formula used in this solution is an application of the Distributive Property:  

Example Question #43 : Quadrilaterals

A kite has a side length of  and another side length that is twice as long. Find the perimeter of the kite.

Possible Answers:

Correct answer:

Explanation:

 A kite must have two sets of equivalent sides. Since we know that this kite has a side length of  and another side that is twice as long, , each of these two sides must have one equivalent side. Therefore, the perimeter of this kite can be found by applying the formula:

 





Note: the correct solution can also be found by: 

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