Spanton, J. Humphrey (John Humphrey) · London, Macmillan and Co., Limited; New York, The Macmillan Company · leaf 27
Fig. 23. If we bisect two sides of a triangle and jointhe points of bisection, we get a line that isalways parallel to the third side (Fig. 24). Quadrilaterals.—If we bisect the foursides of a quadrilateral figure and jointhe points, it will always give us aparallelogram, as shown by dottedlines.… … Fig. 25. Parallelograms drawn between parallel lines on equal basesare always equal in area, and parallel lines drawn at equalheights are always equal to each other and to the bases, asshown by dotted lines (Fig. 26).
Geometrical drawing · Design · Drawing
Internet Archive · Wellesley College Library · Public Domain Mark 1.0. Free to use for anything.
