Circumference and Area of Circle Formulas

what is the circumference of this circle ?

• 3.14 cm 

• 37.68 cm

• 24 cm

• 68.4 cm

A cruise ship has a large, circular window. It has a diameter of 6 meters. What is the window's area?

• 31.25 m²

• 29.55 m²

• 30.36 m²

• 28.26 m²

What are the formulas for circumference of a circle?

• C = π r

• C = π d

• C = 2 π r

• C = 2 π d

How do you find the area of a circle?

• 25.12 inches

• 12.56 inches

• 50.24 inches

• 31.4 inches

Find the area of this Semicircle with a diameter of 18 cm

• 254.34 cm

• 127.17 cm

• 56.52 cm

• 28.26 cm

Find the perimeter of the semicircular region. Round your answer to the nearest hundredth.

• 23.13 m

• 28.26 m

• 14.13 m

• 56.52 m

Find the circumference of the circle

• 21.98

• 153.86

• 43.96

• 615.44

what is the area of this circle ?

What is the area of this circle?

• 6082.12

• 1520.53

• 1893.14

• 1292.92