Question

Find the area of each circle. Round to the nearest tenth

1. a circle with a radius of 6 yards . .
2. a circle with a diameter of 18 millimeters

Answer 1

area = (pi)r^2

Answer 2

so for the first
area = (pi)6^2 = 113.1 yd^2

for the second
r=18/2 =9
area=(pi)r^2 = 254.5 mm^2

Answer 3

Helllppppp.

Find the area of each regular polygon. Round to the nearest tenths.

1. A pentagon with a perimeter of 45 feet .
2. a hexagon with a side length of 4 inches.
3. a nonagon with a side length of 8 meters
4. a triangle with perimeter of 54 centimeters