Circles Tests

Which of the following names a radius?

• segment AC
• segment DB
• segment AB
• segement BC

Which of the following names a diameter?

• segment AC
• segment DB
• segment AB
• segment BC

What is circumference?

• The distance around a circle.
• The space inside the circle.
• A line from side to side passing through the center.
• A line from the center to the side.

Which segment is the diameter?

• AC
• BD
• LM
• CE

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

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

If the measure of arc ABC = 210°, what is the measure of ∠AOC?

• 150°
• 100°
• 210°
• 105°

What is the measure of ∠PTQ?

• 100°
• 140°
• 180°
• 120°

Find the measure of arc AB.

• 17
• 34
• 68
• 146

Find x

• 10
• 5
• 18
• 9

x = ?

• 90
• 180
• 45
• 80