Circles: Area and Circumference

What is the radius of this circle?

• 18
• 10
• 9
• 8

Find the area of the circle

• 43.96
• 153.86
• 87.82
• 307.72

Tags

CCSS.7.G.B.4

Is the red line a radius or diameter of the circle?

• Radius
• Diameter

What is the circumference of a circle with a diameter of 1 inch? Use 3.14 for pi.

• 3.14 inches
• 6.28 inches
• 314 inches
• 628 inches

What is the radius of this circle?

• 18 in
• 10 in
• 9 in
• 8 in

Find the area of the circle below.

• 113.04 cm units²
• 18.84 cm units²
• 9 cm units²
• 28.26 cm units²

Tags

CCSS.7.G.B.4

What is the diameter of this circle?

• 3.5
• 6.5
• 6
• 7

What is the formula for circumference of a circle given the diameter?

• C = π(1/2 d)²
• C = 2πr
• C = πd
• C = πr²

A circle has a radius of 17 inches. What is the circumference?

• 106.76 inches

• 53.38 inches

• 907.46 inches

• 34 inches

Tags

CCSS.7.G.B.4

The circumference of a circle is

• The measurement from an edge of a circle to another edge.
• The measurement around the circle
• The measurement from an edge of a circle to another edge going through the center
• The measurement from the center of the circle to an edge of the circle