Question

A circle is inscribed in a square. If the perimeter of the square is 40, what is the area of the circle? Use 3.14 for pi.

Answer 1

78.5

Explanation:

We have the perimeter of the square, which is 40, and 40/4=10. In this picture, we see that the circle's diameter is the same as the length of one side of the square. Therefore, the diameter of the circle is 10. The are formula for circles is
`\pi r^(2)`, where
`r` is the radius. The radius of the circle is just the diameter divided by 2, and 10/2=5. Now,
`5^2` is 25, and
`3.14\cdot25=78.5`.