Yes, all triangles are polygons.
A polygon is any plane figure bounded only by straight lines. Thus a triangle is a polygon with three sides. Similarly, a quadrilateral is a polygon with four sides, a pentagon is a polygon with five sides, and so on.
they are all polygons
They are all polygons
Yes.
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