PROBLEM VII.
TO DRAW ANY RECTILINEAR QUADRILATERAL FIGURE, GIVEN IN POSITION AND
MAGNITUDE, IN A HORIZONTAL PLANE.
[Illustration: Fig. 19.]
Let _ABCD_ (Fig. 19.) be the given figure.
Join any two of its opposite angles by the line _BC_.
The Elements of Perspective arranged for the use of schools and intended to be read in connection with the first three books of Euclid · 第 33 / 91 题