ISEE Lower Level Quantitative : Geometry

Study concepts, example questions & explanations for ISEE Lower Level Quantitative

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Example Questions

Example Question #641 : Geometry

A square has a perimeter of , what is the lengthh of one side?

Possible Answers:

Correct answer:

Explanation:

The perimeter of a square is the sum of all of its sides. Since a square has four equal sides, the length of one side can be multiplied by four to find the perimeter.

In this problem, however, we are given the perimeter and must find the side.

Therefore, we should divide to find the missing side.

Example Question #1 : Triangles

The perimeter of a triangle is 14 inches.  One side is 4 inches long.  Another side is 5 inches long.  How long is the 3rd side?

Possible Answers:

\dpi{100} 4\ inches

Correct answer:

Explanation:

Add up all of the sides of a triangle to get the perimeter.  Here, 2 of the sides add up to give you 9 inches.  The third side must equal the difference between 14 inches and 9 inches.

Example Question #2 : Triangles

Bill found the perimeter of the triangle below to be 34 units. Screenshot_2015-03-25_at_3.10.52_pm

What is the length of the missing side?

Possible Answers:

15 units

13 units

12 units

20 units

14 units

Correct answer:

14 units

Explanation:

The perimeter of a triangle can be found by adding up all of the sides.

 

Start by adding the two sides that are given: 8 + 12 = 20

The third side can be found by subtracting this sum from the total perimeter: 34 - 20 = 14.  The missing side is 14 units long.

Example Question #3 : Triangles

Zoe drew the below triangle.

Screenshot_2015-03-25_at_3.11.47_pm

What is the perimeter of the triangle?

Possible Answers:

36 inches

39 inches

20 inches

30 inches

40 inches

Correct answer:

39 inches

Explanation:

The perimeter of a triangle can be found by adding all of the side lengths: 8 + 12 + 19 = P.  Therefore, the perimeter of the given triangle is 39 inches.

Example Question #4 : Triangles

Megan drew the triangle below and found its perimeter to be 36 inches.

Screenshot_2015-03-26_at_3.33.33_pm

What is the length of the missing side?

Possible Answers:

15 inches

36 inches

12 inches

21 inches

9 inches

Correct answer:

9 inches

Explanation:

The perimeter of a triangle can be found by adding up all of the sides.

 

Start by adding the two sides that are given: 15 + 12 = 27

The third side can be found by subtracting this sum from the total perimeter: 36 - 27 = 9.  The missing side is 9 inches long.

Example Question #5 : Triangles

James found the perimeter of the triangle to be 95 cm.

Screenshot_2015-03-29_at_2.50.56_pm

What is the length of the missing side?

Possible Answers:

Correct answer:

Explanation:

To find the perimeter of a triangle, add the lengths of the three sides together. In the given triangle, . Combine like terms and solve for  in order to find the length of the missing side: 

The missing side is  long.

Example Question #5 : Triangles

Screenshot_2015-03-29_at_2.51.35_pm

What is the perimeter of the above triangle?

Possible Answers:

Correct answer:

Explanation:

To find the perimeter of a triangle, add up the lengths of the three sides:

Example Question #642 : Geometry

What is the perimeter of the triangle below? 

Screen shot 2015 11 09 at 8.17.56 am

 

Possible Answers:

Correct answer:

Explanation:

To find the perimeter, we add all of the side lengths together. 

Example Question #6 : Triangles

What is the perimeter of the triangle below? 

Screen shot 2015 11 09 at 8.18.26 am

 

Possible Answers:

Correct answer:

Explanation:

To find the perimeter, we add all of the side lengths together. 

Example Question #7 : Triangles

What is the perimeter of the triangle below? 

Screen shot 2015 11 09 at 8.22.47 am

 

Possible Answers:

Correct answer:

Explanation:

To find the perimeter, we add all of the side lengths together. 

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