Question

5.
The sum of three sides of a triangle is 135 m. If the sum of its two sides is 7 10 m, find the length of
1
the third side.


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Answer 1

Answer:

sides of triangle = x+ x+x = 135

2 sides = 7+10+x=135

17+x=135

x=135-17

x=118

therefore the measure of the 3rd side is 118 m

Answer 2

ANSWER : We know that, the sum of three sides of traingle = Perimeter of traingle

So, let a traingle ABC in which AB + BC = 7 + 10 m and sum of its three sides i.e. AB + BC + AC = 135 m

Now, (AB + BC) + AC = 135

7 + 10 + AC = 135

AC = 135 - 17

AC = 118 m