The length of the side of the square is equal to the length of the side of the polygon, which has twenty equal

The length of the side of the square is equal to the length of the side of the polygon, which has twenty equal sides. Find the perimeter of twenty squares if the perimeter of the square is 16 cm.

The task:
the length of the square a -? centimeters,
the perimeter of the square P1 is 16 centimeters,
perimeter of a twenty-gon P2 -? centimeters.
Decision:
1) calculate the length of the square:
P1 = 4 a, a = P1: 4 = 16: 4 = 4 centimeters;
2) define the perimeter of the twenty-gon, n = 20:
P2 = n * a = 20 * 4 = 80 centimeters.
Answer: The perimeter of the twenty is P2 = 80 centimeters.