Apothem facts for kids
The apothem (sometimes shortened to apo) of a regular polygon is a line segment from the center of the polygon to the middle of one of its sides. It is also perpendicular to that side. The word "apothem" can also mean the length of that line segment. Regular polygons are the only polygons with apothems; because of this, all apothems of one shape are congruent.
Properties
The apothem, a, can be used to find the area of any regular polygon with the side length, s, according to the following formula, which also states that the area is equal to the apothem times half the perimeter since ns = p.
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See also
In Spanish: Apotema para niños
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Apothem Facts for Kids. Kiddle Encyclopedia.