Calculate the perimeter and area of a 2cm and 8cm rectangle. the perimeter of the square

Calculate the perimeter and area of a 2cm and 8cm rectangle. the perimeter of the square is equal to the perimeter of the rectangle, which is the side of the square.

Given:

length – 2 cm;

width – 8 cm;

P pr = P square =? cm.

but – ? cm.

The task of calculating the perimeter of a rectangle. The perimeter is calculated using the formula:

P = 2 * (a + b) – where, a – length, b – width.

1) P = 2 (2 + 8) = 2 * 10 = 20 (cm).

A square has four equal sides. By the condition of the problem, P pr = P square.
We calculate the side of the square using the formula: a = P: 4

2) 20: 4 = 5 (cm).

Answer: the perimeter of the rectangle is 20 cm; side of the square 5 cm.