No, a triangle is the only polygon with three sides. All other polygons have four or more sides.
No because a polygon must have 3 or more sides and the next shape after the triangle is a 4 sided quadrilateral
no
The interior angles of any shape besides a triangle will add up to 360 degrees.
any 10 sided polygon is called a Decagon.
Yes
Yes because any 4 sided shapes are quadrilaterals.
no
The answer could depend on the way in which the shapes are connected but I doubt that it has any specific name.
The interior angles of any shape besides a triangle will add up to 360 degrees.
any 10 sided polygon is called a Decagon.
A triangle
Yes
Yes eg dodecagon
Any odd-sided shape.
Any 4 sided shapes are quadrilaterals
Yes because any 4 sided shapes are quadrilaterals.
Any polygon, and thence, any polyhedron.
The three angles inside any triangle always add up to 180 degrees. Any triangle.