Its a tetrahedron
A regular polygon has equal sides and angles. A polygon has a surface area but a polyhedron has many faces as for example a pyramid.
A polygon with 20 sides is an icosagon.
yes it is because its faces are pentagons so it is a polygon
A rectangle has no curved faces; it has four straight edges and four right angles. It is a polygon with a flat, two-dimensional shape. If you are referring to a three-dimensional shape like a rectangular prism, it still does not have any curved faces, as all its faces are rectangular.
you add up the areas of all the faces on the polygon.
An internal angle of the polygon.
quadrilateral is a polygon with four sides or edges and four vertices or corners A pyramid is a solid figure with a polygonal base and triangular faces that meet at a common point. So no.
A polygon with four sides and four angles is a quadrilateral.
Faces.
1
a cube
A cube is a polyhedron because it has many faces while a square is a polygon