On a piece of paper there are 15 points such that no three of them are in a same line.Someone wants to join certain pairs of points on this paper with line segments.Given any three points A,B,C.He draws at least two among the three line segments AB,BC,CA.What is the minimum number of line segments he could have drawn?
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Answer:It brought together nearly all of algebra and geometry using the coordinate plane. ... Find the distance between the points A(−4, −3) and B(5, 7). ... As long as (x1, y1) refers to one point and (x2, y2) the other point, it does not matter which one is which. ... Find the coordinates of the midpoint of the line interval AB, given:.
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