Question

The side of an equilateral triangle is 3.5 cm. Find its perimeter.

Answer 1

perimeter of a equilateral triangle = 3a

= 3 ( 3.5) = 10.5

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Answer 2

An equilateral triangle has all equal sides .

So, a side of equilateral triangle (given) = 3.5 cm

Then , other two sides will also be 3.5 cm

And , we know perimeter is the sum of all the sides .

Perimeter = 3.5 + 3.5 + 3.5

10.5 cm