Q:
# What do you call a shape with eight sides?

**In geometry, a shape, or polygon, with eight sides is called an octagon.** A common example of an octagon in the real world is the stop sign. The octagon is also used in architecture, and umbrellas often come in an octagonal shape.

Credit:
De Agostini Picture Library
De Agostini Picture Library
Getty Images

"Octa-" is a prefix derived from the Greek and Latin languages meaning "eight." In addition to eight sides, an octagon also has eight internal angles and eight vertices. The interior angles of an octagon add up to 1080 degrees. A regular octagon has all sides of the same length, and all internal angles are 135 degrees. Another eight-sided figure, the eight-sided star, is called an octagram.

Learn more about Shapes-
Q:
## What are some names of irregular shapes?

A: Unlike a regular shape, an irregular shape is a polygon with sides that aren't all equal and unequal angles. Some conventional geometric shapes, such as th... Full Answer >Filed Under: -
Q:
## What shape has five sides?

A: In geometry, a shape with five sides is called a pentagon. A regular pentagon has five sides of equal length, as well as five equal angles. A standard "STO... Full Answer >Filed Under: -
Q:
## How many sides does an octagon have?

A: An octagon has eight sides. The word derives from the Greek words "okto" meaning "eight" and "gonia" meaning "angle." In many countries throughout the worl... Full Answer >Filed Under: -
Q:
## How do you draw a nonagon?

A: A nonagon is a nine-sided polygon in geometry. The Latin prefix "nonus" means "ninth." Like many polygons, nonagons can be regular or irregular. Regular no... Full Answer >Filed Under: