Ex 11.2, 1 The side of an equilateral triangle is shown by l. Express the perimeter of the equilateral triangle using l. Given that
Side of equilateral triangle = l
We know that
In equilateral ∆ ABC
All Sides are equal
∴ AB = BC = AC = l
So,
Perimeter = Sum of all Sides
= l + l + l
= 3 l

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.

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