Radius = 1111
Centre = (0,0), the origin; radius = 11
8
5. A circle with centre (0,0) has equation: x2 + y2 = radius2 With: x2 + y2 = 25 = 52 The radius is 5.
Type your answer here. Find the radius for a circle with the equation x2 plus y2 equals 9? ..
Radius = 1111
Centre = (0,0), the origin; radius = 11
8
5. A circle with centre (0,0) has equation: x2 + y2 = radius2 With: x2 + y2 = 25 = 52 The radius is 5.
Type your answer here. Find the radius for a circle with the equation x2 plus y2 equals 9? ..
11 = sqrt of 121. it is a circle centred on the origin think what would happen on the line x=0 (The y axis) the equation simplifies to y2 = 121 or y =11 you can also think of eqn of a circle as x2+y2=r2
x2 +y2 = R2 =16 = radius 2 R = 4
I think you have missed out an equals sign. If you mean x2 + y2 = 16, then the radius is 4.
7
X2 + y2 = 100 = r2 r = 10
X2 or 2 times x?
Equation of a circle centre the origin is: x2 + y2 = radius2 ⇒ radius = √9 = 3.