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In a plane, there are 37 straight lines of which 13 pass through the point A and 11 pass through the point B. Besides no three lines pass through one point, no line passes through both points A and B, no two are parallel. Then the number of intersection points the lines have is equal to _____. |
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Answer» In a plane, there are 37 straight lines of which 13 pass through the point A and 11 pass through the point B. Besides no three lines pass through one point, no line passes through both points A and B, no two are parallel. Then the number of intersection points the lines have is equal to _____. |
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