| What are the perimeter and area of this parallelogram? |
 |
| For the perimeter, add up all of the sides: |
| 27 + 12 + 27 + 12 = 78 inches |
For the area, multiply the base times the height: |
| 27 x 7 = 189 square inches |
| What are the perimeter and area of this trapezoid? |
 |
| For the perimeter, add up all of the sides: |
| 32 + 12 + 26 + 9 = 79 inches |
For the area, add up the lengths of the two parallel sides, then multiply the result times the height, then divide the new result by 2: |
| ((32 + 26) x 7) divided by 2 = 203 square inches |
| What are the radius, diameter, circumference, and area of this circle? |
 |
| The radius (the distance from the center to the outside of the circle) is shown in the picture: |
| 6 cm. |
The diameter (the distance from one side to the other side of the circle) is the radius times two: |
| 6 x 2 = 12 cm. |
The circumference (the "perimeter" of the circle) is the diameter times pi: |
| 12 x 3.14 = 37.68 cm. |
The area is the radius squared times pi: |
| 6 x 6 x 3.14 = 113.04 sq. cm. |