Circle Vocab and Central Angles

an arc with endpoints on the diameter and equal to 180

• major arc

• arc

• semicircle

• half circle

Which arcs are semicircles? Check all that apply.

• 
• 
• 
• 

What best describes segment AB?

• chord

• secant

• tangent

• diameter

• radius

a line that intersects the circle at exactly one place.

• diameter

• tangent

• secant

• chord

an arc with a measure greater that 180.

• minor arc

• major arc

• arc

• central angle

What is segment UY?

• chord

• secant

• radius

• tangent

Central angles are angles whose vertex is ____.

• at the center of the circle

• on the circle

• outside the circle

• inside the circle, but not at the center

An angle in a circle with vertex on the center of the circle.

• Central angle

• Angle

• Inscribed angle

• Circle

What is the measure of arc AXB

• 50

• 100

• 180

• 260

A segment that has one endpoint at the center and the other endpoint on the circle is the __________.

• diameter

• chord

• radius

• secant