Question

find the area of triangle whose perimeter is 42 cm if a=b=c find the area of triangle answer
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Answer 1

Answer:

84.87cm

Step-by-step explanation:

I hope it would help you

Answer 2

Step-by-step explanation:

If, a=b=c

Then it is an equilateral triangle.

Perimeter = 42 cm

Therefore Each side = 42/3 = 14 cm

Area of equilateral triangle =

$\frac{ \sqrt{3} }{4} {a}^{2}$

$= \frac{ \sqrt{3} }{4} \times 14 {}^{2}$

$= 84.87$

So the area is 84.87 cm^2

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