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## Homework Statement

http://img16.imageshack.us/img16/9616/area.jpg [Broken]

## The Attempt at a Solution

Area of square = 25cm^2 therefore

Area of the shaded area = 25 - (Area of A + Area of B + Area of C)

Area of A = Area of C

Therefore, Area of the shaded area = 25 - (2 * Area of A + Area of B)

Area of A = [(5 * 5 * 3.14) / 4] - Area of B

Area of A = 19.625 - Area of B

Plug back into the original equation

Area of the shaded area = 25 - (39.25 - Area of B)

How on earth would you find the area of B? I was thinking about applying some formulas regarding finding an area of a sector ([tex]r^2 * theta * 0.5[/tex]), then subtracting it by the triangular area, but it involves trigonometry and this problem does not require the knowledge of trigonometry. Any ideas?

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