The perimeter of the triangle is 74cm, the length of the first side is 36cm and the length of the second

The perimeter of the triangle is 74cm, the length of the first side is 36cm and the length of the second is 9cm less than the length of the third side is equal.

Let’s find what the two unknown sides of the triangle are equal to. To do this, subtract the length of the first side from the perimeter:

74 – 36 = 38 cm.

Subtract from this value the difference between the two unknown parties:

38 – 9 = 29 cm.

Divide the result by 2 to get the length of the shortest side:

29: 2 = 14.5 cm or 14 cm 5 mm.

The length of the third side will be: 14.5 + 9 = 23.5 cm or 23 cm 5 mm.