The width of the rectangle is half of its length, the perimeter is calculated if the length of the rectangle is

The width of the rectangle is half of its length, the perimeter is calculated if the length of the rectangle is 1) 14 cm 2) 8 cm 2 mm 3) 20 m

The perimeter of a rectangle is the sum of all its sides. It is calculated by the formula:

P = 2a + 2b. Let’s find this value, provided that the width is half the length, equal to:

14 cm.
P = 2 * 14 + 2 * (14: 2) = 28 + 14 = 42 cm.

8 cm 2 mm or 8.2 cm (since 1 cm = 10 mm).
P = 2 * 8.2 + 2 * (8.2: 2) = 16.4 + 8.2 = 24.6 cm.

20 m:
P = 2 * 20 + 2 * (20: 2) = 40 + 20 = 60 m.