The best description I have recently heard is "a triangle with the top chopped off".
Take any triangle and put one side on the bottom as the base side. Now "cut off" the top angle with a line parallel to the base side and the resulting shape is a trapezium.
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a shape is called a shape in mathematics
That shape is called a cylinder.That shape is called a cylinder.That shape is called a cylinder.That shape is called a cylinder.
An inscribed shape is inside a circumscribing shape.
A 2 dimensional shape such as a circle is NOT a solid shape, while a sphere is.