Mr. glenie’s Proportions^ 
79 
PROPOSITION III, PROBLEM I. 
fb multiply the fquare of a given finite right line by any 
number . 
UPON an indefinite right line ap fet off the given 
right line ab ; draw bc at right angles to ap and equal to 
ab ; and from a through c draw an indefinite right line 
A(^. Take ad equal to ac, and draw de parallel to bc* 
af equal to ae; and draw fg parallel to bc, and fo on. 
Then it appears (from 47. E. 1.), that the fquare of ac 
