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A polygon that has eight sides is called?
A. Hexagon
B. Heptagon
C. Octagon
D. Decagon
Correct Answer Is Option = Octagon
Notes / Explanation
A polygon that has eight sides is called an octagon, and the naming of polygons according to the number of their sides is an important part of the branch of mathematics that deals with shapes, known as geometry. A polygon is a flat, closed shape made up of straight sides, and polygons are named according to how many sides they have, with each number of sides having its own particular name, most of which come from words meaning the number in question. A shape with three sides is a triangle, a shape with four sides is a quadrilateral, a shape with five sides is a pentagon, a shape with six sides is a hexagon, a shape with seven sides is a heptagon, and a shape with eight sides is an octagon. The word octagon comes from a word meaning eight, and so an eight-sided shape is called an octagon. An octagon has eight sides and eight corners, and therefore eight angles. A regular octagon is one in which all eight sides are of equal length and all eight angles are equal, giving a symmetrical shape, while an irregular octagon has sides or angles that are not all equal. The octagon is a shape that is often seen in everyday life. One of the most familiar examples is the shape commonly used for the sign that instructs drivers to stop at a road junction, which is made in the form of an octagon so that it can be easily recognised. Octagonal shapes are also seen in various objects, buildings and designs, where the eight-sided form is used for both practical and decorative purposes. Learning the names of the polygons according to their number of sides is a basic part of geometry, and it helps in describing and understanding shapes. The same system of naming continues for shapes with more sides, so that a shape with ten sides is called a decagon, and so on. Knowing these names is useful both in mathematics and in general knowledge, and questions about the names of shapes with particular numbers of sides are common. For PPSC and other competitive examinations, the key points to remember are that a polygon with eight sides is called an octagon, that a polygon is a closed shape made of straight sides named according to the number of its sides, that an octagon has eight sides, corners and angles, and that a familiar example of an octagon is the shape of the common stop sign.
