Creative Grids Multi-size 45/90 Degrees Triangle (cgrms4590)Spar 50% This multi sized ruler features two triangles in one. Use the 45 degree side to cut half square triangles from strips up to 5 1 2 inches wide, creating half square triangles up to a finished size of 5 inches. Use the 90 degree side to cut quarter triangles that finish up to a 5 inch finished quarter square triangle. The math required to cut these angles is incorporated into the easy to read black and white markings. The ruler slides easily