Circle Review

What is the formula for finding the area of a circle?

• A = π·d

• C = 2·π·r

• A = π·r²

• C = π·d

What does A represent in the formula:

A = π·r²

• Area

• Radius

• Pi

• Diameter

What does r represent in the formula:

A = π·r²

• circumference

• radius

• diameter

• squared

What is the radius of a circle?

• halfway through a circle

• a line through the center of a circle

• the amount of space inside of the circle

• the distance around a circle

Find the area of the circle.

• 18.84 m²

• 113.04 m²

• 37.68 m²

• 452.16 m²

Find the area of the circle.

• 12.56 cm²

• 25.12 cm²

• 50.24 cm²

• 200.96 cm²

Find the area of the circle.

• 803.84 cm²

• 25.12 cm²

• 50.24 cm²

• 200.96 cm²

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

• 38 inches
• 9.5 inches
• 59.66 inches
• 119.32 inches

what is the circumference of this circle ?

• 3.14 cm

• 37.68 cm

• 24 cm

• 68.4 cm

Find the circumference (to the nearest whole number)

• 88 in
• 44 in
• 116 square in
• None of the above