The equation for a circle is #x^2+y^2=121#. What is the length of the circle's radius?
1 Answer
Mar 25, 2018
Explanation:
#"the standard form of the equation of a circle is"#
#color(red)(bar(ul(|color(white)(2/2)color(black)((x-a)^2+(y-b)^2=r^2)color(white)(2/2)|)))#
#"where "(a,b)" are the coordinates of the centre and r"#
#"is the radius"#
#"here "r^2=121rArrr=sqrt121=11#
