Angles in Circles

Front

What is the measure of an angle formed by two chords that intersect inside a circle?

Back

The measure of the angle is equal to half the sum of the measures of the arcs intercepted by the angle.

Front

What is the formula to find the measure of an angle formed by two secants that intersect outside a circle?

Back

The measure of the angle is equal to half the difference of the measures of the intercepted arcs.

Front

What is the relationship between the central angle and the arc it intercepts?

Back

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

Front

How do you find 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 semicircle?

Back

The measure of a semicircle is 180 degrees.

Front

If two angles are inscribed in a circle and intercept the same arc, what can be said about those angles?

Back

The angles are congruent.

Front

What is the measure of an angle formed by a tangent and a chord?

Back

The measure of the angle is equal to half the measure of the intercepted arc.

Front

What is the relationship between angles formed by intersecting chords?

Back

The measure of each angle is equal to half the sum of the measures of the arcs intercepted by the angle.

Front

What is the measure of arc AB if the central angle AOB is 142 degrees?

Back

The measure of arc AB is 142 degrees.

Front

What is the formula to find the measure of an angle formed by two tangents?

Back

The measure of the angle is equal to half the difference of the measures of the intercepted arcs.