document.write( "Question 1068288: Two circles intersect at A and B.From B two diameters BC and BD are drawn which cut the circles at C and D respectively.Prove that CAD is a straight line. \n" ); document.write( "

Algebra.Com's Answer #683526 by ikleyn(52878) $\"\"$ $\"About$

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document.write( "0.  Make a sketch to follow my arguments.\r\n" );
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document.write( "1.  Consider the angle CAB.\r\n" );
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document.write( "    This angle is right angle, since it leans the diameter.\r\n" );
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document.write( "2.  Consider the angle DAB.\r\n" );
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document.write( "    This angle is right angle, since it leans the diameter.\r\n" );
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document.write( "3.  Since both angles CAB and DAB are right angles, the rays AC and AD make one straight line.\r\n" );
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