Area and circumference

Name the line show.

• Secant

• Diameter

• Radius

• Chord

What is the formula for area of a circle?

• C=πd
• C=πd²
• A=πr²
• A= C/d

What is Circumference?

• π
• The distance around the outside of a circle
• The amount of space on the inside of a circle

What is the area of the circle?

• 15.7 cm²
• 78.5 cm²
• 31.4 cm²
• 5 cm²

What is the circumference of the circle?

• 25.12 in.
• 12.56 in.
• 50.24 in.

Find the area of the circle

• 43.96
• 153.86 
• 87.82
• 307.72

What is the radius of this circle?

• 18
• 36
• 9
• 8

What is the formula for Circumference?

• C = π×r²
• C = 2×π×r

What is the radius of this circle?

• 18 in
• 10 in
• 9 in
• 8 in

What is the diameter of this circle?

• 3.5 m
• 3 m
• 5 m
• 7 m