All 2-dimensional shapes.
They may be closed or open, concave or convex, made of straight lines or curved ones, the lines may or may not cross each other.
Chat with our AI personalities
Length, width, vertices (corners), sides, thickness.
A 3d shape is a forms of shapes that have length , width and death of thickness.
2d shapes only have length and width, while 3d shapes have length, width and depth.
If the bar is a three dimensional object it will have some thickness. Then, assuming it is oblong in shape and knowing its length, width and thickness: Surface_area = 2 x (length x width + width x thickness + thickness x length)
A plane figure