Arc and Central Angles

Name a minor arc

• AB

• BDA

Name a major arc.

• BD

• BDA

What is the measure of ∠PTQ?

• 100°

• 140°

Name a semicircle arc

• ABD

• DAB

What is the relationship between a central angle and its arc?

• The angle is half of the arc.

• The arc is half of the angle.

• The arc is smaller than the angle.

• They are congruent.

What is the measure of arc AD?

• 38

• 142

• 180

• 153

What is the measure of arc AB?

• 140

• 142

• 180

• 153

Name a minor arc

• AD

• ADB

• AB

• CD

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.