Question

Write the equation of a circle with center at (0, 0) and a diameter of 20.

Answer 1

x^2+y^2=r^2

Answer 2

(x-0)^2+(y-0)^2=(10)^2

Answer 3

equation of circle is\[(x-h)^2+(y-k)^2=(r)^2\] h,k center and r-- radius

Answer 4

dia=20
radius= dia/2=20/2=10 :)