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Question

How do you find the length of a side joining points when the second coordinates (y-coordinates) are the same?

Answer 1

If the second coordinates of two points are the same, then the line joining the two points will be a vertical line. In this case, the length of the side (which is vertical) can be found by subtracting the y-coordinate of one point from the y-coordinate of the other point. This will give you the vertical distance between the two points, which is the length of the side.