Question

Find the lenght of each of the equal sides of the isosceles triangle, if the perimeter and unequal side are :

1. perimeter : 55cm , unequal side : 15cm​

Answer 1

Answer:

Let the equal sides be x

perimeter of triangle = a + b + c

55 = x + x+ 15

55 = 2x + 15

2x =55-15

2x = 40

x = 40/2

x = 20 cm