a cylinder
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A curved line in 3-dimensional space.
a trapezoid has no curved faces it is all straight faces
A curved shape does not have any straight lines. In a circle the line curves continually, meaning that the circle is a curved shape.
Many shapes have curves. Some curved shapes include:circle (2-dimensional)cone (3-dimensional)sphere (3-dimensional)cylinder (3-dimensional)
The sphere. Unlike the circle, the sphere is a sort of "3 Dimensional" version of the circle. A circle, being a 2-D round shape, has a face... whereas brought into 3-D, the sphere is free of all "faces".