in the area of each triangular regions is as shown, what is the area of the polygon?161718

The correct answer is:  [C]:  " 18 " {" 18 units " .} .
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Explanation:
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Add up the given areas, to get the total area of the given polygon:

3 + 5 + 8 + 2 = 

(3 + 5) + 8 + 2 =

8 + 8 + 2 = 

(8 + 8) + 2 = 

16 + 2 = 

" 18 " .  The answer is:  " 18 (units) " ; which is:  Answer choice:  [C]:  " 18 " . 
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