Area of Circles Sectors Segments Annuli

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 area of a circle is 25 π in² , then the diameter is?

• 10 in
• 5 in
• 25 in
• pi in

Which segment is the diameter?

• AC
• BD
• LM
• CE

Which segment is a radius?

• LM
• DC
• BD
• ML

The definition of a circle is

• set of all points in a plain that are the same distance from a point called the center

• the distance around a share

• a large figure

• a pizza, orange, plum, or watermelon

The definition of circumference is

• distance from the center of any point on the circle

• distance from one point to another

• distance around the circle

• distance from the center of any point on the circle

What is the circumference?

• 36

• 115.45

• 108

• 113.04

Find the area of the circle. Leave in terms of π.

• 18π in²

• 9π in²

• 81π in²

A line segment on the interior of a circle with endpoints on the circle

• Radius
• Diameter
• Secant
• Chord

A line that passes through a circle

• Secant
• Tangent
• Chord
• Radius