Dear sir,

Asked by gouthamjayarajan | 24th Dec, 2009, 08:16: PM

Expert Answer:

s = semiperimeter = (9+12+15)/2 = 18

Using Heron's formula,

A = (s(s-a)(s-b)(s-c)) = (18x9x6x3) = 54 sq. unit

Regards,

Team,

TopperLearning

Answered by  | 24th Dec, 2009, 08:24: PM

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