Question

an isosceles triangle has a perimeter of 60in. the congruent sides measure (2x+9)cm. the length of the third side is 3xcm. what is the value of X?

Answer 1

Come on, guys. By the time you take trig, a little algebra shouldn't be a problem . . .

an isosceles triangle has two equal sides.
the perimeter is the sum of all the sides

2x+9 + 2x+9 + 3x = 60
7x + 18 = 60
x = 6