Chapter 6.1

Angles, Polygons, and the Triangle Inequality

Name: Angles, Polygons, and the Triangle Inequality
Description: Angles add up in predictable ways, and side lengths obey one inequality that rules out more than you expect.

Angles add up in predictable ways, and side lengths obey one inequality that rules out more than you expect.

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By the end

01Chase angles through parallel lines, triangles, and polygon angle sums
02Bound side lengths with the triangle inequality
03Use the angles and symmetries of regular polygons

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