Hi, Standard form is the quideline

Standard Form of an Equation of a Circle is  

where Pt(h,k) is the center and r is the radius

x^2 + (y-4)^2= 64 center(0,4) radius = 8

 (x+3)^2 + (y+6)^2 = 49 center(-3,-6) radius = 7  eccentricity = 0



·	At eccentricity = 0 we get a circle

·	For 0 < eccentricity < 1 we get an ellipse  

·	for eccentricity = 1 we get a parabola

·	for eccentricity > 1 we get a hyperbola   

·	for infinite eccentricity we get a line

 

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