9-4 Inscribed angles (Flashcardizz)

Front

What is an inscribed angle?

Back

An inscribed angle is an angle formed by two chords in a circle which have a common endpoint. The vertex of the angle is on the circle, and the sides of the angle are the chords.

Front

What is the relationship between an inscribed angle and the arc it intercepts?

Back

The measure of an inscribed angle is half the measure of the intercepted arc.

Front

If an inscribed angle intercepts an arc of 120°, what is the measure of the inscribed angle?

Back

The measure of the inscribed angle is 60°.

Front

What is the measure of an angle inscribed in a semicircle?

Back

The measure of an angle inscribed in a semicircle is always 90°.

Front

If two inscribed angles intercept the same arc, what can be said about their measures?

Back

If two inscribed angles intercept the same arc, they are equal in measure.

Front

How do you 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 formula for finding the measure of an angle formed by two tangents 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

If angle ACB is inscribed in a circle and intercepts arc AB, what is the relationship between m∠ACB and m(arc AB)?

Back

m∠ACB = 1/2 m(arc AB).

Front

What is the measure of an inscribed angle that intercepts an arc of 80°?

Back

The measure of the inscribed angle is 40°.

Front

If RT is a diameter of a circle, what is the measure of any angle inscribed in the circle that intercepts RT?

Back

The measure of any angle inscribed in the circle that intercepts RT is 90°.