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Transcript
Geometry §14.6 Angles formed by Tangents: Tangent: A line that intersects a circle in one point (the point of tangency). Theorem: If a line is tangent to a circle, then it's perpendicular to the radius containing the point of tangency. There are 3 types of angles that can be formed with a tangent... • Measure of angle formed by tangent and chord is ½ intercepted arc. 1 • Measure of angle formed by tangent and secant is ½ the difference intercepted arc. • Measure of angle formed to by two tangents is ½ the difference of intercepted arc. 2 3 Examples: Homework: §14.5 #19 §14.6 #1-9, 13, 14, 18