Question

The sides of a triangle are 12 m, 5x m, and 4x m long. (a) Express the perimeter of the triangle in terms of x. (b) Find the perimeter of the triangle when x = 4.

So now (a) Express the perimeter of the triangle in terms of x. and (b) Find the perimeter of the triangle when x = 4.

Answer 1

a) 9x + 12

b) 48 m

Explanation:

Perimeter is the sum of all sides:

12 + 5x + 4x

12 + 9x

x = 4

12 + 9(4)

48