The perimeter of an isosceles triangle is 42cm

Asked by maham237 @ 06/01/2021 in Mathematics viewed by 266 People

The perimeter of the given equilateral triangle is 42 cm find s if it's side length is (3s+2) cm

Answered by maham237 @ 06/01/2021

Answer:

14cm

Step-by-step explanation:

Given parameters:

perimeter of the triangle = 42cm

length of side = (3s + 2)cm

Unknown:

Find the length of each side = ?

Solution:

The perimeter of a body is the sum of all its sides.

In this problem, we have been given an equilateral triangle. For such a triangle, all the sides are equal. So the perimeter is the sum of all the three sides;

(3s + 2) + (3s + 2) + (3s + 2) = 42

9s + 6 = 42

9s = 42 - 6

9s = 36

s = 4;

The length of its sides = 3s + 2

= 3(4) + 2

= 12 + 2

= 14cm

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