Area and Circumference of Circles Review

If the circumference of a circle is 113.04 and the diameter of a circle is 12 which of the following best represents pi?

• 12/113.04

• 113.04/12

• 6/113.04

• 113.04/6

What is the area of this circle?

• 163.2

• 15.3

• 124.2

• 113.04

what is the area of this semicircle ?
d = 8 cm 

• 100.48 cm²

• 80 cm²

• 200.96 cm²

• 25.12 cm²

The diameter of a circle is 3 centimeters. What is the circumference?

• 11.5cm

• 9.42 cm

• 32.5 cm

• 45.3 cm

what is the circumference of this circle ?

• 3.14 cm 

• 37.68 cm

• 24 cm

• 68.4 cm

Find the circumference of a circle with a radius of 12.5 mm .

• 37.68mm

• 18.84mm

• 78.5mm

• none of the above

Find the circumference of a circle with a 14 yd radius. (use 3.14 for pi)

• 87.92 yd

• 43.96 yd

• 615.3 yd

• 90.13 yd

Find the area of the circle

• 56.52

• 254.34

• 1017.36

• 113.04

What is the area of this circle?

• 82.13

• 78.5

• 314.16

• 170.12

If my diameter is 19 inches, what is my radius?

• 38 inches

• 9.5 inches

• 59.66 inches

• 119.32 inches