ISEE Lower Level Quantitative : Triangles

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

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Example Questions

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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:

13 units

15 units

14 units

20 units

12 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

20 inches

40 inches

39 inches

30 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:

9 inches

12 inches

15 inches

36 inches

21 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 forin order to find the length of the missing side:

The missing side islong.

Example Question #6 :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 #39 :How To Find The Perimeter Of A Figure

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 #40 :How To Find The Perimeter Of A Figure

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 #41 :How To Find The Perimeter Of A Figure

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.

Example Question #42 :How To Find The Perimeter Of A Figure

What is the perimeter of the triangle below?

Screen shot 2015 11 09 at 8.23.04 am

Possible Answers:

Correct answer:

Explanation:

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

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