Question

Write the standard form of the equation of the circle with the radius of 12 and center at the origin.

Answer 1

A circle is written as x^2+y^2=r^2. if the center is at the origin, it doesnt need to be vertically or horizontally. you would square the radius, 12, and set it equal to x^2+y^2. the final equation is x^2+y^2=144