The perimeter of a triangle is 84 centimeters. If two sides are equally long and the third side is 9 centimeters longer than the others, find the lengths of the three sides.

Answer 1

P=84

P=s +s + s+9 = 3s+9

3s+9 = 84

3s = 84-9= 75

s = 75/3 = 25 cm = length of each of 2 sides

3rd side = s+9 = 25+9 = 34 cm

25+25+34 = 84