By similar triangles, if (2,1) is the mid-point of line ab,
then the y-intercept is 2*1=2 at (0,2), and the x-intercept is 2*2=4 at (4,0)
point c (2,1) is the midpoint of line segment ab. Find the coordinates of points a and b if they are both on axes. explain and justify your reasoning
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