Question

The center of a circle is at (0, 0), and the radius of the circle is 3 2 . Which equation represents the circle?

Answer 1

Answer:

x² + y² = 9

Step-by-step explanation:

The equation of a circle centred at the origin is

x² + y² = r² ← r is the radius

Here r = 3, hence

x² + y² = 3² ⇒ x² + y² = 9

Answer 2

Answer:

18

Step-by-step explanation: