# Study Material for Circles- Module 20

Find the Center and Radius of the circle X^2+(y-1)^2=16 Center- (h,k)=(0,1)
r=4
Find the Center and Radius of the circle (x+2)^2+(y-1)^2=1 Center=(-2,1)
r=1
Find the Center and Radius of the circle x^2+y^2-6y=0 Center=(0,3)
r=3
Find the Center and Radius of the circle x^2+y^+10x-8y=-32 Center=(-5,4)
r=3
Write the standard equation for the cirlce whos center is at (4,1) and r=3 (x-4)^2+(y-1)^2=9
Sketch the graph of the equation. If the graph is a parabola, find its vertex. If its a circle, find its center and radius. x=y^2-11 vertex= (-11,0)
Sketch the graph of the equation. If the graph is a parabola, find its vertex. If its a circle, find its center and radius. (x-5)^2-7 vertex= (5,-7)
Sketch the graph of the equation. If the graph is a parabola, find its vertex. If its a circle, find its center and radius. x^2+y^2=121 Center=(0,0)
r= 11
Sketch the graph of the equation. If the graph is a parabola, find its vertex. If its a circle, find its center and radius. (x-4)^2+(y-4)^2=25 Center= (4,4)
r=5
Sketch the graph of the equation. If the graph is a parabola, find its vertex. If its a circle, find its center and radius. x^2+y^2-6x+4y-36=0 Center=(3,-2)
r=7