Point in Base of Isosceles Triangle Small 320×259 Medium 640×518 Large 1024×829 Download Tiff Original 2400×1943 | (198.1 KB) Description Illustration to show that the difference of the distances from any point in the base produced of an isosceles triangle to the equal sides of the triangle is constant. Keywords angle, angles, base, isosceles, point, triangle, triangles Galleries Miscellaneous Triangles Source: G.A. Wentworth Plane And Solid Geometry (Boston: Ginn & Company, 1899) 71 Courtesy the private collection of Roy Winkelman