1. Homework Review Tangents

2. No points of intersection (same center)
Concentric Circles
Same center but different radii

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

4. 1. Find x A 12 B 9
a2 + b2 = c2 x
= x2
x = 15

5. RQ = 16 2. Find RQ a2 + b2 = c2 P 12 8 R Q 122 + (QR)2 = (8+12)2

6. 3. Is BC tangent to the circle?
a2 + b2 = c2 ? No A 32 C 16 24 B

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

8. 4. Find x R S T

9. 5. Find x R S T

10. 6. Find x. B A C P D E

11. 7. Find NP N T S P R Q

12. CW/HW
Worksheet