A septagon or a heptagon
2d shapes that do not have equal sides do not usually have special names.
Polygons are 2D plane figures. All polygons with 7 sides would be classified as heptagons.
Triangles
rectangle
the answer is 8
Hectogon
2D - Nonagon 3D - Nonahedron
isoceles triandle, square
Square and rhombus.
No
Squares
in 2d shapes a quadrilateral