The three sides of a triangular field are 20 metres, 21 metres and 29 metres long respectively. The area of the field is :
Options:
A . 210 m2
B . 215 m2
C . 230 m2
D . None of these
Answer: Option A Since (20)2 + (21)2 = (29)2 So, it is a right-angled triangle with base = 20 m and height = 21 m ∴ Area = $$\left( {\frac{1}{2} \times 20 \times 21} \right)$$ m2 = 210 m2
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