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ഒരു ത്രികോണത്തിന്റെ വശങ്ങളുടെ നീളങ്ങൾ 13cm , 14cm , 15cm ആയാൽ ത്രികോണത്തിന്റെ പരപ്പളവ് എത്ര?

A80cm²

B84cm²

C88cm²

D90cm²

Answer:

B. 84cm²

Read Explanation:

area=s(sa)(sb)sc)area=\sqrt{s(s-a)(s-b)s-c)}

s=a+b+c2=13+14+152=21s=\frac{a+b+c}{2}=\frac{13+14+15}{2}=21

area=21(2113)(2114)(2115)area=\sqrt{21(21-13)(21-14)(21-15)}

=21×8×7×6=\sqrt{21\times 8 \times7 \times 6}

=84cm2=84 {cm}^2


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