American text books of art education : Geometrical drawing (1873)
Smith, Walter, 1836-1886 · Boston : James R. Osgood & Co. · leaf 98
ving four times the area of agiven triangle ABC. Find the altitude A D of the triangle. Make E F equal to thebase B C of the triangle ; erect a perpendicular E H at E, of twicethe height of the altitude A D, and complete the oblong required. Prob. 107. — To draw a triannle equal in area to a qiven…
Geometrical drawing
Internet Archive · Boston Public Library · Public Domain Mark 1.0. Free to use for anything.
