Tangent Lines (P2)

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.
(2)
A) Describe this theorem in your own words.
THEOREM: The tangent chord angle is half the measure of the intercepted arc.
(3)
A) What is the measure of the intercepted arc if the tangent-chord angle is 180?[br][br]B) What is the measure of the tangent-chord angle if the intercepted arc is 180?[br][br]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)[br][br]D) Describe this theorem in your own words.
– Ms. Matlock

Information: Tangent Lines (P2)