What is the perimeter of an equilateral triangle if this perimeter is 4 times the perimeter

What is the perimeter of an equilateral triangle if this perimeter is 4 times the perimeter of a square with a side of 4 cm 5 mm?

The perimeter of a polygon is the sum of the lengths of all its sides.

Since an equilateral triangle has three sides and they are all the same length, its perimeter is:

Ptr. = a + a + a = 3 * a.

Since a square is a quadrangle with all sides equal, its perimeter is:

Pkv. = b + b + b + b = 4 * b.

Find the perimeter of a square with a side of 4 cm 5 mm:
Pkv. = 4 * 4 cm 5 mm = 4 * 4 cm + 4 * 5 mm = 16 cm 20 mm.

Since by condition Ptr. = 4 * Pkv., Then:
Ptr. = 4 * 16 cm 20 mm = 4 * 16 cm + 4 * 20 mm = 64 cm 80 mm.

Answer: 64 cm 80 mm.