The shape best describes the object generated when a half-circle is rotated about the axis hollow sphere.
When a half-circle is rotated about the axis, it forms a 3-D ring around the axis such that,
What is the meaning of rotation of the axis?
A standard right-handed Cartesian coordinate system is used, with the x-axis to the right and the y-axis up, the rotation R(θ) is counterclockwise.
The region inside the ring will be empty because it's half of a circle.
Therefore, it will create a hollow sphere or ball when a half-circle is rotated about the axis
Hence, the hollow sphere is the best shape that describes the object generated when the half-circle is rotated about the axis.
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