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Given that the circle A whose equation is given by x^2+y^2+4x+6y-12=0 passes through...
Given that the circle A whose equation is given by x^2+y^2+4x+6y-12=0 passes through the point p(-5,-7) find,
i)the centre of circle and radius
ii) the coordinates of the other end point of the diameter through P
iii) the equation of circle which shares the same centre as circle A and touches the x-axis.
Answer I) r=5
i do not know how to do part 3 please help
1 Answer | add yours
High School Teacher
Equation of the circle is
(i)Thus centre of the circle = (-2,-3)
radius of the circle= r
(ii) Let the other end point of diameter opposite to (-5,-7) be `_(x_1,y_1)`
`-2=(x_1-5)/2 => -4=x_1-5`
(iii) Equation of x-axis is y=0
length of perpendicular from (-2,-3) to x-axis=-3
Posted by aruv on July 28, 2013 at 5:44 AM (Answer #1)
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