Lesson 10-5: Tangents

1. Lesson 10-5: Tangents Geometry CP Mrs. Mongold

2. Tangent: a line that shares only one point with a circle and is perpendicular to the radius or diameter at that point. • Point of tangency: the point that a tangent shares with a circle • Two lines that are tangent to the same circle and meet at a point, are congruent from that point to the points of tangency

3. Lines AC and AF are tangent to circle X at points B and E respectively -B and E are points of tangency C F E B A

4. Radius XB is perpendicular to tangent AC at the point of tangency C F E B A

5. AE and AB are congruent because they are tangent to the same circle from the same point E B A

6. Is LM a tangent? Justify.

7. Find x if WE is tangent to circle D

8. Find x

9. Find the perimeter of the triangle