256a - Parts of a Circle

a straight line from the center to the circumference of a circle or space

• Diameter

• Circumference

• Area

• Radius

Is this Radius or Diameter?

• Radius

• Diameter

Is this Radius or Diameter?

• Radius

• Diameter

What is the diameter of a circle when the measure of its radius is 24 m?

• 12

• 32

• 25

• 48

A circular swimming pool is 21 feet in diameter.

How many feet is the pools radius?

• 10.5 ft

• 42 ft

• 65.94 ft

• 131.95 ft

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

• C = π r
• C = 2 π r
• C = π d
• C = π 2 d

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

• C = π r
• C = 2 π r
• c = π d
• C = π 2 d

Which part of the circle is represented in the picture?

• diameter

• radius

• circumference

The radius of a circle is 2 times bigger than the diameter.

• True

• False

A line segment from the center of a circle to any point on the circle is called the:

• diameter

• radius

• circumference