Cental Angles and Arc Measure$

Front

What is a Central Angle?

Back

A central angle is an angle whose vertex is at the center of a circle and whose sides are radii that extend to the circumference.

Front

What is a Chord?

Back

A chord is a line segment with both endpoints on the circle.

Front

What is a Diameter?

Back

A diameter is a special type of chord that passes through the center of the circle, dividing it into two equal halves.

Front

What is a Minor Arc?

Back

A minor arc is an arc that is smaller than a semicircle.

Front

What is a Major Arc?

Back

A major arc is an arc that is larger than a semicircle.

Front

What is a Semicircle?

Back

A semicircle is an arc that represents half of a circle.

Front

How do you name a semicircle arc?

Back

A semicircle arc can be named using the endpoints and a point on the arc, such as ABD or DAB.

Front

What is the measure of a central angle in relation to the arc it intercepts?

Back

The measure of a central angle is equal to the measure of the arc it intercepts.

Front

If the measure of ∠PTQ is 140°, what is the measure of the intercepted arc?

Back

The measure of the intercepted arc is also 140°.

Front

What is the relationship between a chord and the arcs it creates?

Back

A chord divides a circle into two arcs: a minor arc and a major arc.