In the PKM triangle, the PK side is 43cm, the KM side is 10 cm larger than the PK, and the PM

In the PKM triangle, the PK side is 43cm, the КM side is 10 cm larger than the PK, and the PM side is 19 cm smaller than the КM side. Find the RKM pyrimeter.

1 action.
Find the size of the КM side. To do this, add 10 cm to the side of the RK, since according to the condition of the problem it is 10 cm more.
43 + 10 = 53 cm
2 action.
Find the size of the PM side. To do this, subtract 19 cm from the side of the КM, since according to the condition of the problem it is 19 cm less.
53 – 19 = 34 cm.
3 action.
Find the perimeter of the triangle. The perimeter is the sum of all the sides of the polygon.
43 + 53 + 34 = 130 cm.
Answer: the perimeter of the triangle is 130 cm.