The equation to the circle with its center at the origin (原点) and of radius a is x^2 + y^2 = a^2.
The equation to the circle with its center at the origin (原点) and of radius a is x^2 + y^2 = a^2.
发布时间:2025-10-30 23:05:37
The equation to the circle with its center at the origin (原点) and of radius a is x^2 + y^2 = a^2.