# ISEE Lower Level Quantitative : Quadrilaterals

## Example Questions

### Example Question #11 : Plane Geometry

Angela found the perimeter of the trapezoid below to be 35 cm. What is the length of the missing side?      Explanation:

To find the perimeter of a trapezoid, add up the lengths of the four sides. In the given trapezoid, To find the missing side, combine like terms and solve for    The length of the missing side is thus .

### Example Question #12 : Plane Geometry What is the perimeter of the above trapezoid?      Explanation:

To find the perimeter of a trapezoid, add up the lengths of the four sides. In the given trapezoid, ### Example Question #13 : Plane Geometry

Ted drew the parallelogram shown below. What is the perimeter of the parallelogram?

17 feet

40 feet

12 feet

26 feet

13 feet

26 feet

Explanation:

The perimeter of a parallelogram can be found by summing the lengths of each of the sides.  In a parallelogram, opposite sides have the same length.  Therefore, you should use the equation 8 + 8 + 5 + 5 = P.  The perimeter of the parallelogram is 26 feet.

### Example Question #14 : Plane Geometry

Guillermo drew the parallelogram below. What is the perimeter of the parallelogram?

20 millimeters

26 millimeters

40 millimeters

42 millimeters

72 millimeters

40 millimeters

Explanation:

The perimeter of a parallelogram can be found by summing the lengths of each of the sides.  In a parallelogram, opposite sides have the same length.  Therefore, you should use the equation 8 + 8 + 12 + 12 = P.  The perimeter of the parallelogram is 40 feet.

### Example Question #15 : Plane Geometry

Find the perimeter of the following parallelogram.      Explanation:

We plug in our values into the equation for the perimeter: ### Example Question #16 : Plane Geometry

Find the perimeter of the following parallelogram.      Explanation:

We plug in our values into the equation for the perimeter: ### Example Question #17 : Plane Geometry

Find the perimeter of the following parallelogram.       Explanation:

We plug in our values into the equation for the perimeter: ### Example Question #18 : Plane Geometry

What is the perimeter of the polygon below?       Explanation:

To find the area of a perimeter, we add all of the side lengths together. ### Example Question #19 : Plane Geometry

What is the perimeter of the polygon below?       Explanation:

To find the area of a perimeter, we add all of the side lengths together. ### Example Question #20 : Plane Geometry

What is the perimeter of the polygon below?         