Question

2) Center: (0, 0)
Radius: 18
write the equation of the circle

Answer 1

x^2 + y^2 = 324

Explanation:

A circle with radius 18 and center (0, 0) is "all points that are exactly 18 units away from (0, 0)". A point's distance from (0,0) is
`√(x^2+y^2)`

We have:

`√(x^2+y^2) = 18\\\\x^2 + y^2 = 18^2 = 324`