GEO 3/16

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

A _____ is half of a circle.

• circumference
• pi
• semicircle
•  composite figure

Which segment is a radius?

• LM
• DC
• BD
• ML

If the area of circle is 100 π , find the radius of the circle.

• 10 π
• 10
• 50
• 50 π

Find x.  Assume that segments that appear to be   tangent are tangent.

• 2
• 11
• 7.6
• 9

Find x

• 10
• 5
• 18
• 9

Find the value of x.

• 31,3
• 8
• 16.3
• -8

Find the red minor arc and its measure. Then find the blue major arc and its measure.

• AB, 135; ADB, 225

• ADB, 225; AB, 135

Identify each arc as a minor arc, major arc, or a semicircle. Then find its measure. BC

• major arc, 70

• minor arc, 70

• minor arc, 315

• minor arc, 315