Equilateral And Isosceles Triangles Small 320×280 Medium 640×560 Large 1024×896 Download Tiff Original 2400×2101 | (192.0 KB) Description An illustration showing an isosceles triangle in an equilateral triangle. Keywords equiangular, equilateral, isosceles, triangle, triangles Galleries Miscellaneous Triangles Source: Albert A. Hopkins Scientific America: Handy Book Of Facts And Formulas (New York: Munn & Co., Inc., 1918) 30
