Area and Circumference

Does this picture show the diameter or radius of a circle?

• Diameter

• Radius

Find the circumference of the circle.

• 78.5 cm

• 15.7 cm

• 7.85 cm

• 19.6 cm

Find the circumference of the circle.

• 38.47 cm

• 10.99 cm

• 43.96 cm

• 21.98 cm

Find the area of the circle

• 43.96

• 153.86

• 87.82

• 307.72

What is the area of this circle?

• 6082.12

• 1520.53

• 1893.14

• 1292.92

Pi is an ​ (a)   number.

• irrational

• rational

• natural

• whole

Ethan measured a circular lid and found d, the diameter, was 8 inches and C, the circumference, was 25 inches. Which expression represents an approximate value for pi?

Find the area of the circle, giving your answer to 1 decimal place.

• 3.1cm²

• 12.6cm²

• 6.3cm²

• 50.3cm²

Find the area of the circle, giving your answer to 1 decimal place.

• 78.5cm²

• 19.6cm²

• 19.6m²

• 78.5m²

Find the area of the circle, giving your answer to 1 decimal place.

• 154.0cm²

• 38.5cm²

• 38.4cm²

• 153.9cm²