Area of a Circle

What is the formula for area of a circle given the radius?

• A = πr

• A = 2πr

• A = πd

• A = πr²

What is the area of this circle?

• 82.13 m²

• 78.50 m²

• 314.16 m²

• 170.12 m²

What is the area of this circle?

• 1256.64

• 31.41

• 314.16

• 123.12

What is the area of this circle?

• 6082.12

• 1520.53

• 1893.14

• 1292.92

A cruise ship has a large, circular window. It has a diameter of 8 meters. What is the window's area?

• 31.25 m²

• 29.55 m²

• 30.36 m²

• 50.27 m²

Shring's dining room table is round and has a radius of 4.5 feet. What is the tabletop's area?

• 63.585 ft²

• 68.345 ft²

• 64.585 ft²

• 61.345 ft²

what is the area of a circle with the diameter of 10cm ?

• 66cm

• 78.5cm

• 66.5cm

• 10m

The radius of a circular clock is 13 centimeters. What is the area?

• 530.66 cm²

• 81.68 cm²

• 40.84 cm²

• 348.99 cm²

• 50.24 mm²

• 103.62 mm²

• 153.86 mm²

• 615.44 mm²

• 200.96 mm²

The largest cookie ever baked measured a radius of 51 feet.  Which of these is the closest to the area of the cookie?  

• 2601 ft²

• 8167 ft²

• 2042 ft²

• 162 ft²