Question Detail
Question
What is the equation of a circle with radius 6 units and centre at the origin?
Correct Answer
Option B is the correct answer.
Detailed Explanation
For a circle centred at the origin, the equation is x² + y² = r². With r = 6, this is x² + y² = 36, which can also be written as x² + y² - 36 = 0.
Hint
The equation for a circle centred at the origin is x² + y² = r².