Question

9. Each of the two equal sides of a triangle is 5 m less than seven times the third side. Find the dimensions of the triangle, if its perimeter is 3x + 26. ​

Answer 1

Step-by-step explanation:

Let the third side be x m.

Then the two equal sides are of length (2x−5) m.

Perimeter of triangle = 55 m.

⟹ x+(2x−5)+(2x−5)=55

⟹ 5x−10=55

⟹ x=13

Hence, the length of the triangle's sides are 13m, 21m and 21m.