Circle Vocab Angles

An angle whose vertex (corner) is at the center of the circle.

• Major Arc

• Minor Arc

• Central Angle

• Inscribed Angle

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

• 18

• 22

• 25

• 31

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.

Mathematical Equivalence

ON

Find the value of x.

Mathematical Equivalence

ON

Think about if the angles are equal or if they add up to 180. Solve for x. Plug it in.

Mathematical Equivalence

ON

Name a minor arc

• AD

• ADB

• AB

• CD

Name a major arc.

• ABD

• BDA

• BCD

• DA

What is the measure of arc AD?

• 38

• 142

• 180

• 153