Angle BCD is a circumscribed angle of circle A.

Circle O is shown. Line segments C O And A O are radii. Lines are drawn from points C and A to point B to form chords B C and B A. Angle C B A is 80 degrees.

Points N, P, and R all lie on circle O. Arc PR measures 120°.

The measure of minor arc JL is 60°.

Points N and R both lie on circle O. Line segment RQ is tangent to the circle at point R.

Circle C is shown. Line segments E C and C D are radii. Lines are drawn from points E and D to point F on the other side of the circle. Arc E D measures 95 degrees.

Points A, B, C, and D lie on circle M. Line segment BD is a diameter.

Points E, F, and D are located on circle C.

Line segment ON is perpendicular to line segment ML. Line segment OM = 13 units in length, line segment PN = 8 units in length.

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