"other" in the question implies that you already have a partial list. It is not possible to answer the question without knowing what is already on the list.
Triangular based Pyramid
A point. Other shapes may not have straight sides but that does not mean that they do not have sides.
Polygons are 2D plane figures. All polygons with 7 sides would be classified as heptagons.
Two shapes are similar when the sides of one are directly proportional to the corresponding sides of the other. That all the corresponding angles are equal.
Regular hexagons and other shapes based on hexagons. Polygons with 6k sides (positive integer k) where sets of k adjacent sides and angles are congruent to the next set, and other shapes based on these.
Heptagon.
A heptagon.
A septagon or a heptagon
Most triangles, quadrilaterals, and other polygons with five or more sides; most closed shapes with curved sides.Most triangles, quadrilaterals, and other polygons with five or more sides; most closed shapes with curved sides.Most triangles, quadrilaterals, and other polygons with five or more sides; most closed shapes with curved sides.Most triangles, quadrilaterals, and other polygons with five or more sides; most closed shapes with curved sides.
Other hexagons.
Retangles, squares, parralelegrams and various other shapes
Any regular polygon with 5, 7 or more sides.
Of some shape, Yes. Of other shapes, No.
They are the boundaries of the shapes.
The names of polygons are: 3: triangle 4: quadrilateral 5: pentagon 6: hexagon 7: heptagon 8: octagon 9: nonagon or enneagon 10: decagon There are, of course, many other shapes with curved sides.
A square will have 4 sides that are all the same length, and 4 angles that are 90 degrees each. Other shapes will have 4 sides, but they may be of different lengths. Other shapes will have 4 equal sides, but not 4 angles of 90 degrees.
Shapes that have four sides are known as quadrilaterals.