# ISEE Lower Level Quantitative : Triangles

## Example Questions

### 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?

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 #1 : Triangles

Bill found the perimeter of the triangle below to be 34 units.

What is the length of the missing side?

15 units

20 units

14 units

13 units

12 units

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 #2 : Triangles

Zoe drew the below triangle.

What is the perimeter of the triangle?

40 inches

30 inches

39 inches

36 inches

20 inches

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 #3 : Triangles

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

What is the length of the missing side?

36 inches

12 inches

9 inches

15 inches

21 inches

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.

What is the length of the missing side?

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

What is the perimeter of the above triangle?

Explanation:

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

### Example Question #1892 : Common Core Math: Grade 3

What is the perimeter of the triangle below?

Explanation:

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

### Example Question #81 : Geometry

What is the perimeter of the triangle below?

Explanation:

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

### Example Question #291 : Problem Solving

What is the perimeter of the triangle below?

Explanation:

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

### Example Question #81 : Find Perimeter Or Missing Side Lengths Of Polygons: Ccss.Math.Content.3.Md.D.8

What is the perimeter of the triangle below?