Question

A triangle has a perimeter of 165 cm. The first side is 65 cm less than twice the second side. The third side is 10 cm less than the second side. Find the length of each side of the triangle.

What equation represents the length of the first side if the second side is length s?

2s + 65

165 - s

2s - 65

s - 10

Answer 1

2s - 65

Step-by-step explanation:

First side: 55cm Equation: 2s - 65

Second side: 60 cm Equation: s

Third side: 50 cm Equation: s - 10

All sides: 55cm, 60cm, 50cm

Answer 2

2s - 65

Step-by-step explanation:

The first side is 65 cm less than twice the second side meaning that the first side = 2 x second side - 65

= 2s - 65