← Geometry Course
UNIT 9 · LESSON 5

Polygon Angle-Sum Formula

Study many-sided figures and the patterns connecting their angles.

WHY LEARN THIS?

This idea has a purpose.

Mathematics becomes much easier when you understand what a tool was designed to accomplish. This lesson will build Polygon Angle-Sum Formula from the idea itself instead of asking you to memorize a rule first.

Places this kind of mathematics can appear:

architecture
tiling
graphic design
computer modeling
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