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What will be the perimeter of an equilateral triangle of side equal to 9 cm?

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81 cm

27 cm

18 cm

36 cm

answer is B.

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Detailed Solution

For an equilateral triangle, all three sides are of equal length.

Given, the length of the side of the equilateral triangle is 9 cm.

So, the length of all sides of given equilateral triangle is 9 cm.

Perimeter of equilateral triangle= 3 x sides

= 3 x 9

= 27 cm

So, the perimeter of the equilateral triangle is 27 cm

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