Sides of Triangle Theorem Small 320×217 Medium 640×434 Large 1024×695 Download TIFF Original 2400×1628 | (144.0 KB) Description Illustration used to prove that "If two sides of a triangle are unequal, the angle opposite the greater side is greater than the angle opposite the less side." Keywords angles, geometry, proof, prove, Sides, theorem, theorems, triangle, triangles Galleries Geometric Theorems and Proofs Source: C. A. Hart & Daniel D. Feldman Plane And Solid Geometry (New York: American Book Company, 1911) 54