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10. A circle has the diameter $$\overline { J K }$$ . Where the coordinates for points $$J$$ and $$K$$ are: $$J ( 0 , - 1 ) ; K ( 4 , - 4 )$$ . What is the length of the diameter?
$$\overline { J H } = \frac { \sqrt { x } } { }$$
length of diameter = $$\sqrt{(4- 0)^2+ (- 4+ 1)^2} = 5 units$$