April 3rd, 2019, 12:44 PM  #11 
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April 3rd, 2019, 01:13 PM  #13 
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April 3rd, 2019, 03:49 PM  #14 
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Using (x, y) Cartesian coordinates for A and B, if these points have different xcoordinates, the line through A and B has equation y = mx + c, where m and c are values determined from the coordinates of A and B. The abovementioned circle of radius 1 has equation x² + y²= 1. To find where the circle and line intersect, substitute mx + c for y in the equation of the circle and solve the resulting equation for x. That will give 2 possible values for the xcoordinate of the point of intersection. Only one of these values will lie between the xcoordinate values of the points A and B. 

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circle, coordinates, involving, problem, unit 
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