Question

Write down a simplified expression for the perimeter of this triangle:

side one: 7x - 4w
side two: 2x + 8y
side three: 4y + 2w

do not factorise the answer

Answer 1

9x-2w+12y

Explanation:

Perimeter of triangle

= (7x-4w) + (2x+8y) + (4y+2w)

= 7x-4w+2x+8y+4y+2w

= 9x-2w+12y