1. Tangent Applications in Circles More Problems Using Pythagorean Theorem

2. If a line (segment or ray) is tangent to a circle, then it is perpendicular to the radius drawn to the point of tangency. Point of Tangency

3. a 2 + b 2 = c 2 x = 15 9 2 + 12 2 = x 2

4. a 2 + b 2 = c 2 RQ = 16 12 2 + (QR) 2 = (8+12) 2 12 2 + (QR) 2 = 20 2

5. No a 2 + b 2 = c 2 ?

6. R S T If two segments from the same exterior point are tangent to a circle, then they are congruent.

7. R S T

8. R S T

9. A C E B D P

10. T S Q P N R