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Q: Is an Octagon a convex polygon?

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yes

A convex polygon.I suspect that what you mean is a convex polygon.

There are six triangles in an octagon. In any convex polygon, there are two less triangles than the number of sides. So a octagon which has 8 sides, contains 6 triangles.

A convex polygon, including an octagon, is a 2d shape such that any straight line joining any two points on its boundary lies wholly within the shape. This is assured if each of its interior angles is less than 180 degrees.

Is a concave polygon.

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yes

A convex polygon.I suspect that what you mean is a convex polygon.

Yes, an octagon is a polygon that has eight sides.

is this a polygon? is it concaver or convex

a polygon is convex

The measure of the exterior angle of a convex octagon is indeterminate.

Any polygon that has an angle that is > 180º is a concave polygon. A convex polygon does not. e.g. All regular polygons are convex.

An 8 sided polygon is an octagon

There are six triangles in an octagon. In any convex polygon, there are two less triangles than the number of sides. So a octagon which has 8 sides, contains 6 triangles.

an octagon is a polygon. an octagon has 8 sides. a polygon is a shape with closed sides.

It can be but need not be.

If the octagon is a regular octagon (all eight sides and all eight angles are equal), then it is a regular polygon. If it is not a regular octagon (i.e. if it is an irregular octagon) then is it an irregular polygon.

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