Arcs Semicircles and Central Angles

Which is true of a minor arc?

• It forms half a circle.

• It forms a whole circle.

• It measures greater than 180 degrees. 

• It measures less than 180 degrees.

Which is true of a major arc?

• Forms half a circle.

• Forms a whole circle.

• Measures greater than 180 degrees.

• Measures less than 180 degrees.

What is the measure of arc AD?

• 38

• 142

• 180

• 153

• x = 160
• x = 40
• x = 80
• x = 360

Solve for x. 

• 5

• 20

• 40

• 85

Determine the radius of a circle with a central angle of 30 degrees subtended by an arc with a length of 61

• 2.0

• 29.5

• 91.0

• 116.5

A _____ is half of a circle.

• circumference

• pi

• semicircle

• composite figure

Solve for x. Hint: Angle 85 is a Central Angle and is congruent to a minor angle. Solve

• x = 11

• x = 6

• x = 8

This is a picture of ___________. Hint: big or Small

• Minor Arc

• Major Arc

• Semi-Circle

This is a picture of ___________. Hint: Big or Small

• Minor Arc

• Major Arc

• Semi-Circle