Math, asked by ttt36, 1 year ago

there are there are 20 non collinear points in a plane how many (¡)straight lines(¡¡) Triangles can be drawn by joining these points?

Answers

Answered by Anonymous
6
hi there !!
here is ur answer

formula to be used
n C r = n!/r!(n-r)!

no to straight lines can be drawn
= 20 C 2
and no of triangle can be drawn
= 20 C 3
hope helped...
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