The length of the rectangle is 5 cm, the width is 4 cm. Each side was increased 3 times. find area and perimeter. compare them.

Find the perimeter of the first rectangle:
5 + 5 + 4 + 4 = 18 cm.
Let’s calculate the area of the first figure:
5 * 4 = 20 cm2.

Let’s find the length of the second rectangle:
5 * 3 = 15 cm.
Let’s calculate the width:
4 * 3 = 12 cm.
Let’s find what the perimeter of the second figure is:
15 + 15 + 12 + 12 = 54 cm.
find the area of the second quadrangle:
15 * 12 = 180 cm2.

Let’s find how much the perimeter of the first figure is less than the perimeter of the second:
54 – 18 = 36 cm.
Let’s find the difference in areas:
180 – 20 = 160 cm2.
Answer: 18 and 54 centimeters; 20 cm2 and 180 cm2.