A circle with a radius of 4 cm is cut out of a square with a side of 8 cm. Find the area of the remaining part of the square.

Step one.

Let us determine what value the area of the square will correspond to if from the condition of our problem we know for sure that its side is 8 centimeters:

8 * 8 = 64.

Step two.

Let us determine what value the area of the circle cut out of the square will correspond to if from the condition of our problem we know for sure that its radius is 4 centimeters (we will take the number π as 3.14):

3.14 * 4 * 4 = 50.24.

Step three.

Let’s find out the area of what is left of the square:

64 – 50.24 = 13.76.

Answer: 13.76 cm2.