A 5-sided 2D shape would be a pentagon, pent, meaning 5.
1 Equilateral triangle, 2 Square, which is a special case of 3 Rhombus, 4 Pentagon with equal sides, 5 Hexagon with equal sides etc etc
it a shape the sides have names 5 sides = pent
a 2d shape with 5 sides is PENTAGON.
A pentagon has five sides and five corners.
It has 5 corners if it is a 3D shape like a piramid but if it is 2D it is 3
Length, width, vertices (corners), sides, thickness.
a regular star
The shape is a regular pentagon.
5 sides, 5 corners.
Not sure about angels since I do not believe in heavenly beings but, a pentagon has 5 angles and 5 sides.
There is no such shape. A 2d shape with 5 sides and all equal angles must be a regular pentagon (or a 5-pointed star if you stretch the definition of "all angles"). And a regular pentagon - or star - has 5 lines of symmetry.