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bzava17
 one year ago
i need help! please help
How many lines are determined by 7 points, no 3 of which are collinear? How may triangles are determined by the same points if no 4 are coplanar?
bzava17
 one year ago
i need help! please help How many lines are determined by 7 points, no 3 of which are collinear? How may triangles are determined by the same points if no 4 are coplanar?

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kantalope
 one year ago
Best ResponseYou've already chosen the best response.0I don't know if there is a formula but I think there is going to be 7 points (why so big a number?) anyway 12, 13, 14, 15, 16, 17 21(but that is the same at 12 so wont count, 23, 24, 25, 26, 27 31(already accounted for), 32(already counted), 34, 35, 36, 37 I see a pattern emerging...
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