Geometryeasy · Past Paper
What is the equation of a circle with center (0, 0) and radius 5?
Ax + y = 25
Bx^2 + y^2 = 5
Cx^2 + y^2 = 25
Dx^2 - y^2 = 25
✓ Correct Answer: C — x^2 + y^2 = 25
Standard form of circle equation with center (0,0) is x^2 + y^2 = r^2. Here 5^2 = 25.
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