document.write( "Question 1119818: 8 points are placed on the line a, 7 points are placed on the line b. How many triangles is it possible to form such that their vertices will be the given points, if a∥b? \n" ); document.write( "

Algebra.Com's Answer #735439 by ikleyn(52908) $\"\"$ $\"About$

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document.write( "You have   = 8*21 = 168 triangles having one vertex in line \"a\" and two vertices in line \"b\".\r\n" );
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document.write( "Plus you have  = 7*28 = 196 other triangles, having one vertex in the line \"b\" and 2 vertices in the line \"a\".\r\n" );
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document.write( "In all, there are 168 + 196 = 364 triangles.\r\n" );
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