They are solid shapes that taper to a point.
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A pyramid and a cone are alike because they are both are like in the same shape.
A cone has a circular base while a pyramid has a square (rectangular) base.
Because they are both triangles and they are both 3 dimensional!
a pyramid and a cone are alike because they both have a flat side on the bottom and they can slide. they are different because a pyramid has 5 flat sides on the sides and 1 flat side on the bottom part. a cone can roll but a pyramid can't roll like the cone.
Start with a regular tetrahedron (triangular based pyramid). As you increase the number of sides in the base of the pyramid, the shape becomes more and more like a right cone. In the limit, the base tends to a polygon with an infinite number of sides - a circle, and the pyramid tends to a right cone.