Draw a rectangle that is 5cm long and 2cm shorter in width. Calculate its perimeter.

1) Since the length of the rectangle is 5 cm, and the width of the rectangle is 2 cm less, then to find the width, you need to subtract 2 cm from the length.

5 cm – 2 cm = 3 cm – the width of the rectangle.

2) In order to find the perimeter of a rectangle, you need to add all the sides or apply the formula S = 2 * (a + b).

P = 5 cm + 5 cm + 3 cm + 3 cm = 2 * 5 cm + 2 * 3 cm = 2 * (5 cm + 3 cm) = 2 * 8 cm = 16 cm.

Answer: the perimeter is 16 cm.