4:4: MEASUREMENT OF LAND. 



Where the field is a square, a parallelogram, a rhombus, 

 or a rhomboid. 



Square. Parallelogram. Rhombus. Rhomboid. 



HULE. Multiply the length in rods by the breadth in 

 rods, and divide the product by 160, and the quotient will 

 be the number of acres. 



EXAMPLE. What is the area in acres of a field of 30 

 rods long by 28 rods wide. 



SOLUTION. 30 x 28 =840-=- 160 =5 acres and 40 rods, or 

 5^ acres. Ans. 



Where the field is triangular. 



RULE. Multiply the base or longest side, in rods, by 

 the perpendicular height (i.e., the greatest width), in rods, 

 and divide half the product by 160, and the quotient will 

 be the number of acres. 



EXAMPLE. What is the area in acres of a triangular 

 field, the base of which is 60 rods long, and its perpendi- 

 cular height 28 rods ? 



SOLUTION. 60 x 28 =1680-f-2= 8404-160 =5 acres and 40 

 rods, or 5J acres. Ans. 



