Find the area of a rectangle ABCD if AB = 4 cm, BC = 10 cm.

In order to complete this task, you need to know the formula for finding the area of a rectangle. We get, based on this:

The formula for finding the area of a rectangle:

S = a * b, where a and b are the sides of the rectangle.

In the condition, we are given that one side is 4 cm, and the other side is 10 cm. Knowing the sides of the rectangle, we can find the area using the formula given above. We get, based on this:

S = a * b = 4 * 10 = 40 cm². We found the area of the rectangle.

Answer: The area of the rectangle is 40 cm².