ACT Math : ACT Math

Study concepts, example questions & explanations for ACT Math

varsity tutors app store varsity tutors android store varsity tutors ibooks store

Example Questions

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

Kite vt act

Using the kite shown above, find the perimeter measurement.

Possible Answers:

\(\displaystyle 85\)

\(\displaystyle 46\)

\(\displaystyle 84\)

\(\displaystyle 34\)

\(\displaystyle 58\)

Correct answer:

\(\displaystyle 58\)

Explanation:

A kite must have two sets of equivalent sides. Since we know that this kite has a side length of \(\displaystyle 12\) and another side length of \(\displaystyle 17\), each of these two sides must have one equivalent side. Therefore, the perimeter of this kite can be found by applying the formula:

 \(\displaystyle p=2(a+b)\)

\(\displaystyle p=2(12+17)\)

\(\displaystyle p=2(29)=58\)

Note: the correct solution can also be found by: 

\(\displaystyle p=12+12+17+17=24+34=58\)


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

Kite vt act

Using the kite shown above, find the perimeter measurement.

Possible Answers:

\(\displaystyle 70\)

\(\displaystyle 107.5\)

\(\displaystyle 105\)

\(\displaystyle 87.5\)

\(\displaystyle 75.5\)

Correct answer:

\(\displaystyle 105\)

Explanation:

A kite must have two sets of equivalent sides. Since we know that this kite has a side length of \(\displaystyle 35\) and another side length of \(\displaystyle \frac{35}{2}=17.5\), each of these two sides must have one equivalent side. Therefore, the perimeter of this kite can be found by applying the formula:

 \(\displaystyle p=2(a+b)\)

\(\displaystyle p=2(35+17.5)\)

\(\displaystyle p=2(52.5)=105\)

Note: the correct solution can also be found by: 

\(\displaystyle p=35+35+17.5+17.5=70+35=105\)

Example Question #281 : Act Math

Kite vt act

Using the kite shown above, find the perimeter measurement.

Possible Answers:

\(\displaystyle 10.25\)

\(\displaystyle 17.5\)

\(\displaystyle 17.25\)

\(\displaystyle 20.25\)

\(\displaystyle 20.5\)

Correct answer:

\(\displaystyle 20.5\)

Explanation:

A kite must have two sets of equivalent sides. Since we know that this kite has a side length of \(\displaystyle 7\) and another side length of \(\displaystyle 3.25\), each of these two sides must have one equivalent side. Therefore, the perimeter of this kite can be found by applying the formula:

 \(\displaystyle p=2(a+b)\)

\(\displaystyle p=2(7+3.25)\)

\(\displaystyle p=2(10.25)=20.5\)

Additionally, the correct solution can also be found by: 

\(\displaystyle p=7+7+3.25+3.25=14+6.5=20.5\)

Example Question #281 : Geometry

Kite vt act

Using the kite shown above, find the perimeter measurement. 

Possible Answers:

\(\displaystyle 52\)

\(\displaystyle 130\)

\(\displaystyle 147\)

\(\displaystyle 65\)

\(\displaystyle 91\)

Correct answer:

\(\displaystyle 130\)

Explanation:

By definition a kite must have two sets of equivalent sides. Since we know that this kite has a side length of \(\displaystyle 26\) and another side with a length of \(\displaystyle 39\), each of these two sides must have one equivalent side. Therefore, the perimeter of this kite can be found by applying the formula:

 \(\displaystyle p=2(a+b)\)

\(\displaystyle p=2(26+39)\)

\(\displaystyle p=2(65)=130\)

Note: the correct solution can also be found by: 

\(\displaystyle p=26+26+39+39=52+78=130\)

The original formula used in this solution is an application of the Distributive Property:  \(\displaystyle 2a+2b=2(a+b)\)

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

A kite has a side length of \(\displaystyle 8\) and another side length of \(\displaystyle 40\). Find the perimeter of the kite.

Possible Answers:

\(\displaystyle 96\)

\(\displaystyle 80\)

\(\displaystyle 88\)

\(\displaystyle 48\)

\(\displaystyle 94\)

Correct answer:

\(\displaystyle 96\)

Explanation:

By definition a kite must have two sets of equivalent sides. Since we know that this kite has a side length of \(\displaystyle 40\) and another side with a length of \(\displaystyle 8\), each of these two sides must have one equivalent side.

The perimeter of this kite can be found by applying the formula:

 \(\displaystyle p=2(a+b)\)

\(\displaystyle p=2(40+8)\)

\(\displaystyle p=2(48)=96\)

Note: the correct solution can also be found by: 

\(\displaystyle p=8+8+40+40=16+80=96\)

The original formula used in this solution is an application of the Distributive Property:  \(\displaystyle 2a+2b=2(a+b)\)

Example Question #48 : Quadrilaterals

A kite has a side length of \(\displaystyle \frac{3}{4} \textup{feet}\)and another side length of \(\displaystyle \frac{1}{3}\textup{feet}\). Find the perimeter of the kite.

Possible Answers:

\(\displaystyle 24\textup{ inches}\)

\(\displaystyle 13\textup{ inches}\)

\(\displaystyle 17\textup{ inches}\)

\(\displaystyle 9\textup{ inches}\)

\(\displaystyle 26\textup{ inches}\)

Correct answer:

\(\displaystyle 26\textup{ inches}\)

Explanation:

A kite must have two sets of equivalent sides. Since we know that this kite has a side length of \(\displaystyle \frac{3}{4}\textup{feet}\) and another side with a length of \(\displaystyle \frac{1}{3}\textup{feet}\), each of these two sides must have one equivalent side.

The perimeter of this kite can be found by applying the formula:

 \(\displaystyle p=2(a+b)\)

Additionally, this problem first requires you to convert each side length from feet to inches. 

\(\displaystyle \frac{3}{4}\textup{ft}=\frac{3}{4}\times\frac{3}{3}=\frac{9}{12}=9\textup{ inches}\)

\(\displaystyle \frac{1}{3}\textup{ft}=\frac{1}{3}\times \frac{4}{4}=\frac{4}{12}=4\textup{ inches}\)

The solution is:

\(\displaystyle p=2(9+4)\)

\(\displaystyle p=2(13)=26\)

Note: the correct solution can also be found by: 

\(\displaystyle p=9+9+4+4=18+8=26\)

The original formula used in this solution is an application of the Distributive Property:  \(\displaystyle 2a+2b=2(a+b)\)

Example Question #41 : Kites

A kite has a side length of \(\displaystyle 20\) and another side length of \(\displaystyle 13.5\). Find the perimeter of the kite.

Possible Answers:

\(\displaystyle 67\)

\(\displaystyle 76\)

\(\displaystyle 53.5\)

\(\displaystyle 33.5\)

\(\displaystyle 270\)

Correct answer:

\(\displaystyle 67\)

Explanation:

By definition a kite must have two sets of equivalent sides. Since we know that this kite has a side length of \(\displaystyle 20\) and another side with a length of \(\displaystyle 13.5\), each of these two sides must have one equivalent side.

The perimeter of this kite can be found by applying the formula:

 \(\displaystyle p=2(a+b)\)

\(\displaystyle p=2(20+13.5)\)

\(\displaystyle p=2(33.5)=67\)

Note: the correct solution can also be found by: 

\(\displaystyle p=20+20+13.5+13.5=40+27=67\)

Example Question #51 : Kites

A kite has a side length of \(\displaystyle 15\textup{ inches}\) and another side length of \(\displaystyle 30\textup{ inches}\). Find the perimeter of the kite.

Possible Answers:

\(\displaystyle 45\textup{ inches}\)

\(\displaystyle 7.5\textup{ feet}\)

\(\displaystyle 87\textup{ inches}\)

\(\displaystyle 90 \textup{ cm}\)

\(\displaystyle 12\textup{ feet}\)

Correct answer:

\(\displaystyle 7.5\textup{ feet}\)

Explanation:

By definition a kite must have two sets of equivalent sides. Since we know that this kite has a side length of \(\displaystyle 15\) and another side with a length of \(\displaystyle 30\), each of these two sides must have one equivalent side.

The perimeter of this kite can be found by applying the formula:

 \(\displaystyle p=2(a+b)\)

\(\displaystyle p=2(15+30)\)

\(\displaystyle p=2(45)=90\textup{ inches}\)

Note, though, that \(\displaystyle 90\textup{ inches}\) does not appear as an answer choice. Thus, convert \(\displaystyle 90\textup{ inches}\) into \(\displaystyle \textup{feet}\) by: \(\displaystyle 90\div12=7.5\textup{ feet}\)


Example Question #281 : Geometry

A kite has a side length of \(\displaystyle 88\textup{mm}\) and another side length of \(\displaystyle 36\textup{mm}\). Find the perimeter of the kite.

Possible Answers:

\(\displaystyle 264\textup{mm}\)

\(\displaystyle 176\textup{mm}\)

\(\displaystyle 209\textup{cm}\)

\(\displaystyle 248\textup{mm}\)

\(\displaystyle 209\textup{mm}\)

Correct answer:

\(\displaystyle 248\textup{mm}\)

Explanation:

 a kite must have two sets of equivalent sides. Since we know that this kite has a side length of \(\displaystyle 88\textup{mm}\) and another side with a length of \(\displaystyle 36\textup{mm}\), each of these two sides must have one equivalent side.

The perimeter of this kite can be found by applying the formula:

 \(\displaystyle p=2(a+b)\)

\(\displaystyle p=2(88+36)\)

\(\displaystyle p=2(124)=248\textup{mm}\)

Note: the correct solution can also be found by: 

\(\displaystyle p=88+88+36+36=176+72=248\)

Example Question #52 : Quadrilaterals

A kite has a side length of \(\displaystyle 12\textup{cm}\) and another side length of \(\displaystyle 16\textup{cm}\). Find the perimeter of the kite.

Possible Answers:

\(\displaystyle 24\textup{cm}\)

\(\displaystyle 96\textup{in}\)

\(\displaystyle 60\textup{cm}\)

\(\displaystyle 56\textup{cm}\)

\(\displaystyle 90\textup{cm}\)

Correct answer:

\(\displaystyle 56\textup{cm}\)

Explanation:

 A kite must have two sets of equivalent sides. Since we know that this kite has a side length of \(\displaystyle 12\) and another side length of \(\displaystyle 16\), each of these two sides must have one equivalent side.

The perimeter of this kite can be found by applying the formula:

 \(\displaystyle p=2(a+b)\)

\(\displaystyle p=2(12+16)\)

\(\displaystyle p=2(28)=56\textup{cm}\)

Learning Tools by Varsity Tutors