134 



THE PROSPECTOR'S HANDBOOK. 



which worked out as in the last example will give 

 1 acre, 3 roods, 29 &c. poles. 



To find the area of a piece of land indicated by the figure, 

 A D c B. Measure B D. Then find areas of triangles A D B, 

 B D c, as in the last example. 



FIG. 62. 



The whole area equals the area of the triangle A D B 

 added to that of the triangle B D c. 



Similarly, to find the area of a tract of land ABODE. 



c 

 ___^ ~~~/ 



B 



FIG. 63. 



The whole area equals the area of the triangle ODE, plus 

 that of A C E, plus that of A B c. 



