» Area of a regular polygon

Area expresses the extent of a two-dimensional shape, in the plane. Circle, ellipse, parallelogram, rectangle, rhombus, sector, square, trapezoid, triangle. Surface area expresses the extent of a two-dimensional surface of a three-dimensional object. Cone, cube, cuboid, cylinder, sphere, tetrahedron.

Initial Data



$$A= n\times \frac{ar}{2} $$


See also:


2-dimensional shapes


3-dimensional shapes



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