Circle Parts

A circle has a diameter of 20 units. What is its radius?

• 5 units

• 10 units

• 20 units

• 40 units

Which of the following best defines the center of a circle?

• The point that is equidistant from all points on the circle.

• The point that divides the circle into two equal halves.

• The outer edge of the circle.

• The longest chord of the circle.

If a circle's radius is 3.5 inches, what is its diameter?

• 1.75 inches

• 3.5 inches

• 7 inches

• 14 inches

Which option correctly identifies the diameter in a given circle diagram?

• The longest chord in the circle.

• The shortest distance across the circle.

• A line that touches only one point on the circle.

• A segment from the center to the edge.

What is the formula to calculate the diameter if the radius is known?

• Diameter = Radius + Radius

• Diameter = Radius / 2

• Diameter = 2 × Radius

• Diameter = Radius - Radius

Name the pictured part of the circle.

• Diameter

• Sector

• Radius

• Central Angle

• Arc

• center
• diameter
• radius

Line segment BD is a

• tangent

• secant

• diameter

• chord

• diameter
• radius
• center

• center
• diameter
• radius