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document.write( "I'm going to guess what your problem is. I'll bet there are two concentric\r\n" );
document.write( "circles, the smaller circle has a radius of OP = 6 cm. Chord AB is tangent to\r\n" );
document.write( "the smaller circle at P. And AB =
cm. Find the area of the \r\n" );
document.write( "shaded region, the shaded segment of the larger circle. Isn't that what\r\n" );
document.write( "you want?\r\n" );
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document.write( "Draw the two radii OA and OB of the larger circle (in red):\r\n" );
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document.write( "Use the Pythagorean theorem on right triangle OPA.\r\n" );
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= radius of larger circle.\r\n" );
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document.write( "Triangle OPA is a 30-60-90 right triangle because its shortest side OP=6 cm\r\n" );
document.write( "and its longest side OA, is 12, twice the shortest side.\r\n" );
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document.write( "So angle AOP = 60o = π/3 radians, and angle AOB = 120o = 2π/3 radians.\r\n" );
document.write( "We find the area of the sector OAB and subtract the area of triangle OAB.\r\n" );
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document.write( "Area of the sector is
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document.write( "Area of triangle AOP =
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document.write( "Area of triangle AOB = twice area of AOP =
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document.write( "Subtract the area of the triangle from the area of the sector:\r\n" );
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document.write( "About 88.4 cm2.\r\n" );
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document.write( "Edwin
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