Geometry Review

What is the formula to finding the area of a rectangle?

• a= l x w

• a= b x h

• a= b x h ÷ 2

• 24

• 12

• 6

What is the formula to finding the area of a parallelogram?

• a= b x h ÷ 2

• a= l x w

• a= b x h

You can solve the area of a parallelogram when you know the lengths of each of the sides.

• True

• False

Answer explanation

The area of a parallelogram is found by computing base∗height.  In this situation, you would have the base which is the bottom side but you would not have the height measurement.  Since you would not be able to solve for the area with just the side lengths, the statement is FALSE.

If a parallelogram has side lengths of 7 and 3, what is the area?

• 20

• Cannot be determined

• 21

• 10

Answer explanation

To find the area of a parallelogram, you use the formula,

 A=base∗height.  

Since the height in this problem is not known, you cannot solve for area.

Find the area of the following parallelogram:

Find the area of a parallelogram with a base of 6 inches and a height of 9 inches.

What is the formula to find the area of a triangle?

• a= b x h

• a= b x h ÷ 2

• a= l x w

A triangle has base 5.4 inches and height 2.2 inches. What is its area?

• 5.94

• 11.88

• 5.52

What is the area of the triangle?

• 168in²

• 84in²