Chapter 6.6

Tangent Lines and Circles

Name: Tangent Lines and Circles
Description: A tangent line meets its radius at a right angle, and that one fact turns circle problems into triangle problems.

A tangent line meets its radius at a right angle, and that one fact turns circle problems into triangle problems.

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By the end

01Use perpendicular radii and equal tangent lengths
02Join the centers of tangent circles and find their distance

In unit 6

6.1Angles, Polygons, and the Triangle Inequality
6.2Right Triangles
6.3Similar Triangles
6.4Area by Pieces and Ratios
6.5Circles: Angles and Measure
6.6Tangent Lines and Circles
6.7Coordinates and Lattice Points
6.8Moves and Shapes
6.9Thinking in Three Dimensions
6.10Which Idea Opens It? Geometry