Diameter Perpendicular to a Chord in a Circle Small 286×320 Medium 573×640 Large 916×1024 Download Tiff Original 2148×2400 | (290.1 KB) Description Illustration used to show that "The diameter perpendicular to a chord bisects the chord and also its subtended arc." Keywords arc, chord, circle, geometry, proof, proofs, prove, theorem, theorems, unequal arcs, unequal chords Galleries Geometric Theorems and Proofs Source: C.A. Hart, Daniel D. Feldman Plane and Solid Geometry (New York, NY: American Book Company, 1911)