Chapter 8.5, Problem 32E

### Elementary Geometry For College St...

7th Edition
Alexander + 2 others
ISBN: 9781337614085

Chapter
Section

### Elementary Geometry For College St...

7th Edition
Alexander + 2 others
ISBN: 9781337614085
Textbook Problem

# Determine a formula for the area of the shaded region determined by the square and its inscribed circle.

To determine

To find:

A formula for area of shaded region.

Explanation

Formula:

Area of circle:

If r is the radius of circle, then area of circle is given by the formula:

Acircle=Ï€r2.

Area of square:

If the length of side of a square is a, then the area of square is given by the formula:

Asquare=a2.

Calculation:

The area of shaded region can be determined by subtracting the area of inscribed circle from the area of square.

The length of side of square is given as s.

Thus, Asquare=s2.

From the diagram, it is clear that the diameter of inscribed circle is equal to the side of square.

Diameter = s

We know that, radius of a circle is half of the length of diameter.

Thus, radius r of inscribed circle = s2

Letâ€™s substitute the value of r in the formula to find the area of circle

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