The sides of a triangle are three consecutive whole numbers. The perimeter of the triangle is 45 cm. how long is each side

Answer 1

Let's call the three consecutive whole numbers x, x+1, and x+2.

The perimeter of the triangle is the sum of the three sides:
x + (x+1) + (x+2) = 45
3x + 3 = 45
3x = 42
x = 14

So the three sides are 14 cm, 15 cm, and 16 cm.