Equal Segments In An Isosceles Triangle Small 244×320 Medium 487×640 Large 780×1024 Download Tiff Original 1827×2400 | (264.5 KB) Description Illustration showing that if equal segments prolonged through the vertex are laid off on the arms of an isosceles triangle, the lines joining the ends of these segments to the opposite ends of the base will be equal. Keywords angle bisector, congruent angles, congruent segments, equal, isosceles triangle, prolonged, triangles, Vertex Galleries Geometric Theorems and Proofs Source: C. A. Hart & Daniel D. Feldman Plane And Solid Geometry (New York: American Book Company, 1911) 29