A Pentagon is a five sided shape.There are four different kinds of pentagons, not five. The four different Pentagons are regular, irregular, convex and concave.?æ
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If the they are plain figures ( 2 - dimensional), then they are pentagons. Remember you Latin ; 'Penta' means five(5). Pentagons can be regular ( all sides the same length ) , or irregular ( the sides are of different lengths).
Five, to remember this think of a pointy house.
pentagonal prism
Two pentagons and five rectangles.
Five. They are:Tetrahedron (4 triangles)Cube (6 squares)Octahedron (8 triangles)Dodecahedron (12 pentagons)Icosahedron (20 triangles).