Acute angles
regular polygons
Equiangular Polygon...
If 2 of its interior each measure 30 degrees then it is an isosceles triangle
right angles
They are called congruent angles.
rectangle.
Square.
4 right angles, by definition, are four angles of the same measure, and therefore must be congruent angles.
A contraction
Equaliteral Triangle
Equilateral
A shape with no angles or inclinations is called an 'agonic' which comes from the Greek language.