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Example 5 (continued)
The trapezoidal section (left-side) can be seen as
Example 5: composite figure diagram
whence determining the Area for this left-sided portion (Al ) of the property proceeds as follows:
Al  =  12(300 m + 400 m) 500 m
12(700 m) 500 m
350 m 500 m
175,000 m²
The right triangle section (right-side) appears as,
Example 5: composite figure diagram
and finding the Area of this second region (Ar ) can be carried out as follows:
Ar  =  12(300 m) 400 m
150 m 400 m
 

Ar  =  60,000 m²
Armed with the measures for the Areas from both sections of the property, we see that...
Example 5: composite figure diagram
The total Area of the entire property is nothing more than the sum of Al & Ar ...
A  =  175,000 m² + 60,000 m²
235,000 m² 
All that remains to be done is to convert units, from square meters (m²) to hectares (ha), which may be achieved by using our standard operating procedure (SOP):
A  =   235,000 m²    1 ha

 10,000 m² 
=   cancel out a common factor of 1000 AND the unit of square meters (m²)
=    235    1 ha

10
=  
 23.5 ha 
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