The trapezoidal section (left-side) can be seen as
![Example 5: composite figure diagram](G1/Example5c.png)
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](G1/Example5d.png)
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 |
|
|
Armed with the measures for the Areas from both sections of the property, we see that...
![Example 5: composite figure diagram](G1/Example5e.png)
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)](G1/Example5UnitConv.png) |
|
= |
235 × 1 ha |
|
10 |
= |
|
|