Sum of Interior Angles of a Polygon Proof
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Illustration used to prove “The sum of all the angles of any polygon is twice as many right angles as the polygon has sides, less four right angles.”
Keywords
geometry, interior, proof, angle, angles, exterior, sum, theorem, polygonal angles, angles of a polygonGalleries
Geometric Theorems and ProofsSource
C.A. Hart, Daniel D. Feldman Plane and Solid Geometry (New York, NY: American Book Company, 1911)
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