A convex polygon.I suspect that what you mean is a convex polygon.
an arrow is or isn't a polygon?
Yes, the angle sums will be the same regardless of whether or not it is a convex polygon.
Is a concave polygon.
No, a scalene triangle, for example, is a convex poygon but it is not regular.
A convex polygon.I suspect that what you mean is a convex polygon.
is this a polygon? is it concaver or convex
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.
a polygon is convex
A convex polygon is one with no angle greater than 180 degrees. A non-convex polygon is one that is not without such an angle.
an arrow is or isn't a polygon?
It is convex if you look at it from the inside but it is not any kind of polygon.
Yes, the angle sums will be the same regardless of whether or not it is a convex polygon.
Is a concave polygon.
A convex polygon.
A polygon is convex if you can take any two points inside the polygon and connect them with a line segment that is completely contained by the polygon. A non-convex polygon is one which contains at least two points such that the line joining them does not lie entirely inside the polygon.
No. In a convex polygon the sum of the interior angles is (n-2)*180 deg where n is the number of interior angles. In a non-convex polygon this is not necessarily true.