26 Domestic Science 



half the product of the lengths of the side NO and 

 the perpendicular MP. Hence the rule : 



To find the area of a triangle, draw from any of 

 its angular points a straight line perpendicular to the 



Fig. 8. 



opposite side, or, if necessary, to the opposite side 

 produced. Measure the length of this perpendicular 

 and of the side to which it is perpendicular ; half the 

 product of these two lengths is the area of the triangle. 



