Introduction to Circles — Unit test Answers

is tangent to circle P at point Q.

Line EF is tangent to circle G at point A.

Two chords intersect at a point inside a circle that is not the center of the circle. Which statement must be true?

In quadrilateral QRST, measures (5x+15)°. Angle TQR measures (4x+3)°.

Circle K is shown. Tangents S T and U T intersect at point T outside of the circle. A line is drawn from point T to point R on the opposite side of the circle. It goes through center point K. Lines are drawn from points S and U to center point K.

Circle R is shown. Tangents F G and H G intersect at point G outside of the circle to form an angle with a measure of 50 degrees. Point E is on the second arc. Arc F H has a measure of x degrees.

Circle Y is shown. Chords R T and S U intersect. Arc R S is 106 degrees. The angle that intercepts arc R S is 94 degrees.

Circle B is shown. Line segments C B, D B, and E B are radii. Angle C B E is 52 degrees and angle E B D is 160 degrees.

In circle O, and are diameters. Arc ED measures 17°.

Circle O is shown. Tangents B C and B A intersect at point B outside of the circle. The measure of the first arc formed is 146 degrees.

The chords intersect at point U.

Which circle has a central angle that measures 40°?

Which circle shows that measures 60°?

Arc QVT measures 156°.