Question

The lengths, in cm, of the sides of a triangle are 3x – 5, 2x – 1 and x + 1 (a) Write down an expression, in terms of x, for the perimeter of the triangle.

Answer 1

Answer:
`6x-5`

Explanation:

Given

The side lengths of a triangle are
`3x-5, 2x-1,\text{and}\ x+1`

Perimeter(P) is the sum of the side length of the triangle i.e.

`\Rightarrow P=3x-5+2x-1+x+1\\\Rightarrow P=6x-5`

Therefore, the perimeter of the triangle is
`6x-5`