Circles and Cylinders

What is the radius of this circle?

• 18
• 10
• 9
• 8

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

• Radius
• Diameter

Find the area of the circle

• 43.96
• 153.86
• 87.82
• 307.72

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

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

What is the line that goes from the center of a circle to any point on the circle?

• Diameter

• Circumference

• Chord

• Radius

What is this object called?

• Pyramid
• Cone
• Cylinder
• Prism

Find the volume of the cylinder.

• 120π cm³

• 240π cm³

• 960π cm³

• 754π cm³

Find the volume.

• π x 5 x 5 x 10
• 2 x π x 5 x 14
• π x 5 x 5 x 14
• 2 x π x 5