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Q.

The area of a triangle with side 13cm, 14cm and 15cm is [[1]].


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answer is 84 C M 2.

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Detailed Solution

The area of a triangle with sides of 13cm, 14cm and 15cm are 84c m 2 .
Let a=13cm, b=14cm and c=15cm.
We will use heron’s formula to find the area of this triangle.
First, we will find the semi perimeter that is s= a+b+c 2 .
s= 13+14+15 2
s=21cm
Now, the area of triangle= s(s−a)(s−b)(s−c)
= 21(21−13)(21−14)(21−15) = 21(8)(7)(6)
= 7056
=84c m 2
Hence, the correct answer is 84c m 2 .
 
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The area of a triangle with side 13cm, 14cm and 15cm is [[1]].