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A Figure Having a Polygonal Base and Triangular Sides Which Meet in a Point at the Top?

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en.wikipedia.org/wiki/Tetrahedron

The tetrahedron is one kind of pyramid, which is a polyhedron with a flat

www.answers.com/Q/A_figure_having_a_polygon_base_and_triangular_sides_which_meet_in_a_point_at_the_top

www.reference.com/math/three-sided-polygon-called-cfd1b251ec5cec9c

Polygons can have any number of sides, but they must be closed figures. ...

www.reference.com/math/five-sided-polygon-called-90fe0bec3e9d817f

However, there are different types of five-sided polygons, such as irregular, ...

www.reference.com/math/five-sided-polygon-dd8c0b102187d7d8

A five-sided polygon, with five vertices and five angles, is called a pentagon. ...

www.reference.com/math/call-20-sided-polygon-34b04b93b4a5b314

Along with having 20 sides, all icosagons have 20 interior angles that add up to
...

www.reference.com/math/5-sided-polygon-ac23d370568dc0fe

A five-sided polygon is called a pentagon. ...

www.reference.com/math/six-sided-polygon-called-278002d4592c2701

A polygon is an enclosed figure with straight lines that do not cross over one ...

www.ck12.org/geometry/Faces-Edges-and-Vertices-of-Solids/lesson/Faces-Edges-and-Vertices-of-Solids-MSM7/

Dec 2, 2015

www.core-learning.com/downloads/resources/math/geo_apdx1.pdf

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