Question

perimeter an equiateral triangle whose side (s) is 40 cm ​

Answer 1

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Perimeter of an equilateral triangle = 3a

= 3 × 40

= 120

Hence , The perimeter of an equilateral triangle having side = 40 cm is 120 cm .

Answer 2

ANSWER:-

Let the common sides of the equilateral∆ be 'a' cm

Perimeter of an equilateral triangle = 3×a

= 3 × 40

= 120

Therefore,

➡️ Perimeter is 120 cm