round. so that they could spin fast
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Every shape that is round does not have edges. A shape that has sharp points and has straight lines can have edges.
a cylinder has 2 round edges 1 on top and 1 on the bottom.
because it round it rolls.
edges = 4 round base + 4 from vertices of base to apex = 8 edges corners = 4 round base + 1 apex = 5 vertices
0 because it is round.