Find the area of a rectangle if one of its sides is equal to: 1) 36cm and the other 4cm more 2) 18cm and the other 2 times less.

In order to calculate the area of ​​a rectangle, you need to multiply its length by its width.
1) Find out what the second side of the first rectangle is equal to if it is 4 cm larger than the first side, which is 36 cm.
36 + 4 = 40 cm.
Now let’s calculate the area of ​​the first rectangle.
36 * 40 = 1440 cm ^ 2.
2) Next, we find out what the second side of the second rectangle is equal to, if we know that it is 2 times smaller than its first side, which is 18 cm.
18/2 = 9 cm.
Now let’s calculate the area of ​​the second rectangle.
18 * 9 = 162 cm ^ 2.
Answer: The area of ​​the rectangle is 1) 1440 cm ^ 2, 2) 162 cm ^ 2.