Yes.
They are all polygons
They are all polygons.
All three are polygons.
All of them.
They are regular polygons such as a square or an equilateral triangle.
Triangle
they are all polygons
They are all polygons
They are all polygons.
there all polygons and have angles
All three are polygons.
All of them.
A triangle, a square, a rectangle, a pentagon are all polygons.
360 degrees as is with all other polygons!
The all have 2 or more sides
A triangle, a square, a rectangle, a pentagon are all polygons.
Because all other polygons are derived from it