A regular triangle is called an equilateral triangle.
A regular quadrilateral is called a square.
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cone, sphere, cube, polyhedrons
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That would depend on the shape, be it cube, sphere, etc. In general, the volume of any regular solid is its cross-sectional area multiplied by its length.
Plane shapes you draw on paper. Solid shapes can be picked up. Examples of plane shapes would be circle, square, triangle, etc. Examples of solid shapes would be a sphere, a cube, pyramid, and so on. ■
Shapes can tessellate only if a number of them can meet at a point and cover 360 degrees without overlap. For regular shapes this requires that the angles of the shape are a factor of 360 degrees. For non-regular shapes it is necessary that the angles of the shapes can be grouped so that they sum to 360 degrees.
Regular shapes are both equilateral and equiangular. Irregular shapes may or may not be equilateral and equiangular.
visualizing solid shapes means 3 dimensional or 3D figures