'6 A circle has the equation x +y? = 56.25 a) What is the radius of the circle? [2] b) Does the point K(6, 5) lie on the circle; inside the circle or outside the circle? (You must show why you think so) [4]'
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To get the equation in this form, we need to complete the square for both x and y. x + y^2 = 56.25 x + y^2 + (1/2)^2 = 56.25 + (1/2)^2 (adding and subtracting (1/2)^2 to complete the square for x) (x + (1/2))^2 + y^2 = 56.5625 Now we can see that the Show more…
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