Theorem 9-1 + 9-2

Question 1

What is Theorem 9-1

Think tangents + perpendicular

Answer 1

If a line is tangent to a circle, then the line is perpendicular to the radius drawn to the point of tangency.

Question 2

What is the corollary for Theorem 9-1?

Answer 2

Tangents to a circle from a point are congruent.

Question 3

What is Theorem 9-2?

Converse of Theorem 9-1

Answer 3

If a line in the plane of a circle is perpendicular to a radius at its outer endpoint, then the line is tangent to the circle.