39(5 



GEOMETRY. 



Another Method, 



From B or any point in B C, 

 as a centre, describe an arc 

 through the point A. From any- 

 other centre tn in B C, describe 

 another arc through A, cutting 

 the former arc again in «. 

 Through A and « draw the line 

 A D « ; and AD will be the 

 perpendicular required. 



.»^...> 



"::.A. 



C: i 



jax D 



• •* • n 



// 



Note. Perpendiculars may be more readily raised and 

 let fall, in Practice, by means of a square or other fit in« 

 strument. 



PROBLEM VII. 



To divide a given Line A B into afty proposed number of- 

 equal Parts, 



From A draw any line A C 

 at random, and from B drav/ 

 B D parallel to it. On each 

 of these lines, beginning at A 

 and B, set off as many equal 

 parts, of any length, as A B 

 is to be divided into. Join the opposite, points of division 

 by the lines A 5, i 4, 2 3, &c. and they will divide A B 

 as required. 



PROBLEM 



