What is a shape with eight sides called?
8 sided shape are often used in geometry, architecture, and even road signs. Do you want to know what a shape with eight sides is called, what are its features and characteristics? Then, the information we've got is for you.
What is an octagon?
"Octa-" is a prefix from Latin language meaning "eight." That is why a shape, with eight sides, is called an octagon. It is a geometric figure from the group of regular polygons. It has eight angles and sides.
Types of octagon:
- There are regular and irregular octagons
The regular octagon is the polygon with equal angles and sides. If there are some unequal angles or sides then it is an irregular octagon.
- Concave or Convex
If no angles are pointing inwards then it is a convex octagon. In the case when an internal angle is bigger than 180° it is a concave octagon.
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An octagon shape is always closed, otherwise, it can't be considered as an octagon, even if it has 8 sides.
Properties of the octagon
The octagon can be constructed by passing to the sides of the square the middle perpendiculars and connecting the points of their intersection with the circumscribed circle of the square with its sides.
The sum of all the internal angles of the regular octagon is 1080°. Spatial octagon shape is spatial polygon shape with 8 vertices and 8 edges that do not lie in the same plane.
A regular spatial octagon is an isogonal octagon with sides of equal length.
Shape with eight sides around us
In many countries the sign "Movement without stopping is prohibited" has the form of a red octagon.
A shape with 8 sides is often used in architecture. We can see an octagonal shape plan in the Tower of the Winds in Athens and the Dome of the Rock. The octagonal plan is also found in the architecture of churches such as the Cathedral of Saint George (Addis Ababa), San Vitale (Ravenna, Italy), the Florence Baptistery and the octagonal churches of Norway.
Aachen Cathedral central space in the Chapel of Charlemagne has plans in the form of a regular octagon. Many church towers have such 8 sided shape, due to the peculiarities of the construction process of this form.
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Source: Legit.ng
