A tower has a triangular base with side lengths 6y ft, 7y + 2 ft, and 5x – 7 ft. How do you write a simplified expression for its perimeter?
Jan 10, 2016
13y + 5x - 5
to find the perimeter of a shape add all the lengths of the sides together.
adding lengths of 3 sides : 6y +7y + 2 + 5x - 7 .
collecting 'like terms' together to obtain
Perimeter = 13y + 5x - 5