Naming Parts of Circle and Finding Central Angles and Arc Measures

How many degrees are in a circle?

• 90
• 180
• 270
• 360

What is an angle whose vertex is at the center of a circle and whose sides pass through a pair of points on the circle?

• Arc
• Central Angle
• Inscribed Angle
• Intercepted Arc

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.

How do we name a minor arc?

• With 2 endpoints
• With the two endpoints and another middle point

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.

How do we name a major arc?

• With 2 endpoints

• With the two endpoints and another middle point

AD and CG are diameters of Circle B, how would you classify arc CD?

• Minor Arc

• Major arc

• Semi-Circle

• Full circle

Name a major arc.

• ABD
• BDA
• BCD
• DA

What is the measure of arc AB?

• 140
• 142
• 180
• 153

What is the measure of arc AD?

• 38
• 142
• 180
• 153