Question

Find the perimeter of a equilateral triangle if its each side is 12 cm​

Answer 1

Answer:

36

An equilateral triangle has every side equal,so if one side is 12. Then the other 2 side s are also 12. So just multiply 12 by 3 to get the answer

12 x 3=36

Answer 2

Perimeter :

perimeter of equilateral triangle = AB + BC + AC

= 12 + 12 + 12

= 36 cm

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Area :

area of equilateral ∆ = √3/4a²

where a is side of ∆.

area of equilateral ∆ = √3/4 × (12)²

area of equilateral ∆ = √3/4 × 144

area of equilateral triangle = √3 × 36

area of equilateral ∆ = 36√3 cm²