Question

Identify the radius of the circle whose equation is x^2 + y^2 = 36.

Answer 1

radius = 6

Explanation:

The equation of a circle centred at the origin is

x² + y² = r² ←r is the radius

x² + y² = 36 ← is in this form

with r² = 36 ⇒ r =
`√(36)` = 6