Question

Find a area of a triangle whose sides are 6.5cm 7cm and 7.5cm by using heron's formal

Answer 1

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Given :-

Sides are :- 6.5 cm , 7cm and 7.5cm.

Now,

$s = \frac{6.5 + 7 + 7.5}{2} \\ \\ = > s = \frac{21}{2} \\ \\ = > s = 10.5cm$

Now,

By Heron's Formula,
$= > \sqrt{s(s - a)(s - b)(s - c)} \\ \\ = > \sqrt{10.5(10.5 - 6.5)(10.5 - 7)(10.5 - 7.5)} \\ \\ = > \sqrt{10.5 \times 4 \times 3.5 \times 3} \\ \\ = > \sqrt{441} \\ \\ = > 21$
Therefore,

Area of Triangle is 21cm^2.
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Answer 2

Answer:

Step-by-step explanation: