Bisected Vertical Angle of an Isosceles Triangle
Illustration to show that the bisector of the vertical angle of an isosceles triangle bisects the base, and is perpendicular to the base.
Keywordsvertical, angle, triangles, angles, perpendicular, isosceles triangle, bisect, bisector, bisects
G.A. Wentworth Plane And Solid Geometry (Boston: Ginn & Company, 1899) 68