1. Secant Radius Diameter Chord Tangent
Name the term that best describes the notation.
Secant
Radius
Diameter
Chord
Tangent

2. _______ __ _ _____

3. TANGENT = a LINE that intersects the circle exactly ONE time

4. Common Tangents

5. YOUR TURN
3 common tangents
0 common tangents
1 common tangent

6. More Pythagorean Theorem type problems! Yeah!! 
Point of Tangency
If a line is tangent to a circle, then it is perpendicular to the radius drawn to the point of tangency
More Pythagorean Theorem type problems! Yeah!! 

7. 1. Find x 9 x A B 12
leg2 + leg2 = hyp2
= x2
x = 15

8. RQ = 16 2. Find RQ leg2 + leg2 = hyp2 P 12 8 R Q 122 + x2 = (8+12)2

9. leg2 + leg2 = hyp2 r2 + 482 = (r+36)2 r=14
YOUR TURN!!!
Find PT
leg2 + leg2 = hyp2
r = (r+36)2 P
r = r2 +72r+1296 r r
r=14 36 T 48 U

10. R S
If two segments from the same exterior point are tangent to a circle, then they are congruent. T
Party hat problems!

11. 3. Find x R S T

12. 4. Find x A C B

13. YOUR TURN
Find x A C B