HELP PLEASE!! <3 i honestly don't understand what they want me to do here

Question

asked Dec 19, 2023 52.7k views

1 Answer

Ineu · Answer 1 · 2023-12-24T19:04:29+0000

Answer:

(a)

Explanation:

the equation of a circle centred at the origin is

x² + y² = r² ( r is the radius )

x² + y² = 20 ← is in this form , then

centre = (0, 0 ) and r =
√(20) =
√(4(5)) =
√(4) ×
√(5) = 2
√(5)