The three-dimensional object formed when the shape is rotated about the axis is a cone.
What is a cone?
A cone is a solid which tapers from a circular base to a point.
When a right triangle is rotated about an axis, a cone is formed.
Find the attached figure to visualize the rotation.
Rotation of the base AB of the right triangle results in the circular base of the cone while rotation of hypotenuse AC results in the lateral surface of the cone.
Hence, The three-dimensional object is formed when the shape is rotated about the axis is a cone.
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