A triangular piece of land has sides of 9 m, 10 m and 17 m. What is its area?
Correct answer B. 36 sq m
Explanation
s = (9 + 10 + 17)/2 = 18. Area = square root of [18 x 9 x 8 x 1] = square root of 1296 = 36 sq m.
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