Four points on a circle

Four points can be on a circle if the following condition is satisfied. Let the four points be nd a, h ). The four points can be on a 

The condihon of four points on the same circle is given in Equation 1.60. The value of the matrix will be 

Therefore, all four points will be on the same circle. 

The general equation of a circle through three points (a, bi), (02/ 2)/ and (03/ 3) (provided three points do not fall on a straight line) can be given as 

The locus of a point P that moves so that its distance from a fixed point is always in a constant ratio to its perpendicular distance from a fixed straight line is called a conic section. 

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