A triangle.
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.
No. There can be no regular concave polygon.
A polygon can be convex, which means Convex Polygon: A polygon that has all interior angles less than 180° Concave Polygon A polygon that has one or more interior angles greater than 180° A Complex polygon is neither convex or concave. A star polygon is an example of a complex polygon. If you look in google images, there are tons of pics of them.
A convex polygon is a polygon such that no side extended cuts any other side or vertex; it can be cut by a straight line in at most two points Example: A square is a convex polygon, as is an eqilateral triangle. A star shaped polygon is NOT convex. More generally, In Euclidean space, objects are convex if for every pair of points within the object, every point on the straight line segment that joins them is also within the object.
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.
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.