How many sides does a tetrahedron have? 4 SIDES (also known as a triangular pyramid, it has four triangular faces, six straight edges, and four vertex corners.)
Pentagon? 5 SIDES
Hexagon? 6 SIDES
How many sides does a cube have? 6 SIDES (it has 6 faces, 12 edges, and 8 vertices.)
Heptagon? 7 SIDES
How many sides does a British 20 pence piece have? 7 SIDES (It is an equilaterally curved heptagon.)
How many sides does a British 50 pence piece have? 7 SIDES
Octagon? 8 SIDES
Nonagon? 9 SIDES
Decagon? 10 SIDES
Dodecagon? 12 SIDES
How many sides does the British new pound coin have? 12 SIDES
Triskaidecagon? 13 SIDES
Icosagon? 20 SIDES
Pentacontagon? 50 SIDES
Hectagon? 100 SIDES
Chiliagon? 1,000 SIDES
Myriagon? 10,000 SIDES
And finally, how many sides does a Megagon have? 1,000,000 SIDES