They are called polygons
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In geometry three-dimensional shapes are solid figures or objects or shapes that have three dimensions length, width, and height. Unlike two-dimensional shapes, three-dimensional shapes have thickness or depth. A cube and cuboid are examples of three-dimensional objects, as they have length, width, and height.
Try to decompose the figure into simple figures, for which formulae are known - such as triangles, rectangles, circular segments, etc.
A tetrahedron is a three-dimensional figure with four equilateral triangles. Every pyramid with a triangle as the base is a tetrahedron.
The pattern alternates between groups of 3 circles and groups of 3 squares, with the 3 figures always in the order "dotted, dark, white."
A 2-dimensional figure. A 2-dimensional figure. A 2-dimensional figure. A 2-dimensional figure.