Central and Inscribed angles

Front

What is a Central Angle?

Back

An angle whose vertex is at the center of a circle and whose sides intersect the circle.

Front

What is an Inscribed Angle?

Back

An angle formed by two chords in a circle which have a common endpoint.

Front

Define Major Arc.

Back

An arc that is greater than a semicircle.

Front

Define Minor Arc.

Back

An arc that is less than a semicircle.

Front

What is a Secant Line?

Back

A line that intersects a circle at two points.

Front

What is a Tangent Line?

Back

A line that touches a circle at exactly one point.

Front

What is the relationship between a Central Angle and an Inscribed Angle that subtends the same arc?

Back

The Central Angle is twice the Inscribed Angle.

Front

What is the formula for finding the measure of an Inscribed Angle?

Back

The measure of an Inscribed Angle is half the measure of the intercepted arc.

Front

What is the measure of a Major Arc if the Central Angle is 90°?

Back

The Major Arc measures 270°.

Front

Back

The measure of the Inscribed Angle is 60°.