Equation of circle: x^2 +4x +y^2 +6y -17 = 0
Completing the squares: (x+2)^2 +(y+3)^2 = 30 which is the radius squared
Area of the circle: 30*pi square units
Type your answer here. Find the radius for a circle with the equation x2 plus y2 equals 9? ..
7
x2 + y2 = 2r2
Radius = 1111
The ' 1 ' in that equation is the radius.
Type your answer here. Find the radius for a circle with the equation x2 plus y2 equals 9? ..
Radius = 1111
x2 + y2 = 2r2
9
8
7
56
The ' 1 ' in that equation is the radius.
Equation of a circle centre the origin is: x2 + y2 = radius2 ⇒ radius = √9 = 3.
If that equals 16 then the radius is 4
x^2+y^2=36
3 (which is the sqrt of 9)