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An octagon has 8 sides. You can also say "8-sided polygon".

An octagon is a simple figure : it divides the plane on which it is drawn into just two regions. These regions are normally referred to as 'inside' and 'outside'.

It is possible to draw a figure using 8 straight lines which divides the plane into more than two regions.

- Draw a pentagon. On one side of this construct a square. This figure has two insides and an outside.
- Draw a square. Place a point outside the square and above it. Join this point to the two nearest corners of the square. Place another point below the square. Join this point to the two nearest corners of the square. This figure has three insides and an outside.
- Draw a square. Draw its diagonals. From a point outside the square draw lines to the two nearest corners. This figure has five insides and an outside.

There are many more possibilities, which are easy to draw but increasingly difficult to describe in words. Almost all the non-simple figures do not have a name.

Q: What shape has 8 straight lines?

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Polygon: A closed shape bounded by straight lines.

A shape with at least one side that is not straight, a shape where a pair of straight lines cross one another (like an angular figure of 8).

It is an 8 sided polygon - a plane shape bounded by 8 straight lines of equal length. The angles need not be of the same measure.

A quadrilateral or quadrangle.

It could be a stretched circle - a bit like an ellipse except that an ellipse does not have straight lines.

Related questions

octagon

Polygon: A closed shape bounded by straight lines.

A shape with at least one side that is not straight, a shape where a pair of straight lines cross one another (like an angular figure of 8).

No not just any shape that has 8 side can be called an octagon. An octagon has straight lines that make up a closed bounded shape.

A shape with 4 straight lines in which there are 2 parallel and 2 unparallel lines is called a Trapezium.

If the shape has three straight lines and no other lines then it has to be a triangle

A shape made up of line segments is a shape with straight lines, or a polygon. for example, a square has straight lines, or is made up of line segments. A circle is not in that category because it has no straight lines, they are curved.

A hexagon

Two straight lines connected by one curve is the basic horse-shoe shape.

Not really, but if you have many lines it can look like a curved shape.

It is an 8 sided polygon - a plane shape bounded by 8 straight lines of equal length. The angles need not be of the same measure.

There is no kind of shape that has a straight line or curved line a kind of element of the following question is "space"...hope this helps