Coordinate Geometry Circle - NUI Galway - NUI Galway

substitute (—2, 1): x 2 + y2—2x+8y—8=0 (—3, —2) is inside the circle (5, —1) is on the circle (—2, 1) is outside the circle. Exercise 1.3 Find the equation of each of the following circles with given centre and radius, writing your answers in the form x2 + 2gx +2fy + c = 0: 1. Centre (1, 2) and radius 3 3. Centre (—3, —5) and ... ................
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