The points (8, 4) and (2, 2) are the ends of a diameter of a circle. Find the coordinates of the centre and the radius. I know the centre is (5, 3) ...but how do you find out the radius?
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Originally Posted by Joker37 The points (8, 4) and (2, 2) are the ends of a diameter of a circle. Find the coordinates of the centre and the radius. I know the centre is (5, 3) ...but how do you find out the radius? Use the distance formula: Let the (2, 2) be the point (x1, y1) and (8, 4) be (x2, y2): Now, this is the diameter, so take half of that to get the radius: 01
Originally Posted by yeongil Use the distance formula: Forgot about the distance formula.
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