1. The problem statement, all variables and given/known data http://img16.imageshack.us/img16/9616/area.jpg [Broken] 3. 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?