Find the perimeter of the rectangle if it is 8 cm long and half the width.

The perimeter of a rectangle is the sum of all its sides, the opposite sides of which are equal.

According to the condition of the task, you need to find this value for such a figure, provided that the length is 8 cm, and the width is 2 times less.

The formula for determining the perimeter corresponds to:

P = 2a + 2b. Substitute the known values:

P = 2 * 8 + 2 * (8: 2). Find the value in parentheses, then perform multiplication, and only then add:

P = 16 + 8 = 24 cm.