Find the perimeter of a triangle ABC if its sides are equal AB = 17 cm BC = 19cm CA = 22cm.

Given: triangle ABC.
Side AB = 17 cm. (By condition).
Side BC = 19 cm. (By condition).
Side AC = 22 cm. (By condition).
Find: the perimeter of the given triangle.
In order to find the perimeter, you first need to understand what the perimeter is. The perimeter is the sum of all the sides of a shape, in this case a triangle.
Let’s derive a formula for finding the perimeter. We get: P = AB + BC + AC.
Substitute the known values and find the perimeter.
We get: P = 17 + 19 + 22 = 48 cm.
Answer: 48 cm.