Tangent Lines (P2)
- Ms. Matlock
Drag the green dots around to see the theorems at work.
THEOREM: If a line is tangent to a circle, it is perpendicular to the radius drawn to the point of tangency.
A) Describe this theorem in your own words.
THEOREM: The tangent chord angle is half the measure of the intercepted arc.
A) What is the measure of the intercepted arc if the tangent-chord angle is 180? B) What is the measure of the tangent-chord angle if the intercepted arc is 180? C) If the tangent chord angle is T, and the intercepted arc is A, what is the relationship between T and A? (State the equation) D) Describe this theorem in your own words.