Parts of a Circle

What is the center of a circle?

• C. The bottom of a circle

• D. The side of a circle

• B. The top of a circle

• A. The middle of a circle

What is the distance from the center of a circle to any point on the circle called?

• C. Chord

• D. Semicircle

• A. Diameter

• B. Radius

What is a line segment that connects two points on a circle called?

• D. Semicircle

• A. Diameter

• C. Chord

• B. Radius

What is a line segment that connects two points on a circle and goes through the center called?

• B. Radius

• C. Chord

• D. Semicircle

• A. Diameter

What is the plural form of 'radius'?

• B. Radias

• C. Radii

• D. Radiuses

• A. Radios

What is the longest chord possible in a circle called?

• B. Radius

• C. Chord

• A. Diameter

• D. Semicircle

What does a diameter do to a circle?

• B. Makes it smaller

• A. Cuts it in half

• C. Makes it bigger

• D. Doesn't affect it

What is the relationship between a diameter and a radius?

• B. Diameter is twice the length of the radius

• D. Diameter is unrelated to the radius

• A. Diameter is half the length of the radius

• C. Diameter is equal to the length of the radius

What is the length of the diameter if the radius is 4 inches?

• A. 2 inches

• B. 4 inches

• D. 8 inches

• C. 6 inches