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It is a heptagon as it has actually seven sides.

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It is a pentagon as it has 5 sides.
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It is a hexagon as it has six sides.
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It is a quadrilateral together it has 4 sides.

Angles of an octagon:

An octagon is composed of 8 angles. The sum of the angle of one octagon is 1080°.

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In the offered octagon, ∠A + ∠B + ∠C + ∠D + ∠E + ∠F + ∠G + ∠H = 1080°.

An octagon has 8 exterior angles. The amount of the exterior angles of one octagon is 360°.

Regular octagon:An octagon in which all sides and also angles are equal. Every angle that a continuous octagon is 135°.Irregular octagon:An octagon in which every sides and all angles are not equal. Procedures of angles of an rarely often, rarely octagon space different but they all amount to 1080°.
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Real life examples

Some that the many popular instances of the octagon are the avoid signboard and also umbrella.

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Fun Facts about octagon

The native ‘Octagon’ has been derived from the Greek indigenous ‘ὀκτάγωνον’ (oktágōnon) which way eight angles. This is how the form with eight angle was called Octagon.

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During the 1850s and also 1900s, many world started building their residences in the shape of one octagon together it is a symbol that represents rebirth, infinity, regeneration, and also transition.