What is the equation of a circle with centre of origin and radius is 6 cm?
Answer & explanation
Correct answer: option 4
We know that,
(x - x1)2 + (y - y1)2 = r2
Radius of circle = 6 cm
Here,
x1, y1 = the center of the circle
c = radius of the circle
The center is at the origin
So here, x1 = 0, y1 = 0
Radius of the circle (c) = 6 cm
Equation of circle is = (x - 0)2 + (y - 0)2 = 62
= x2 + y2 - 36 = 0