Heptagon
2D shape
In geometry, a heptagon or septagon is a seven-sided polygon or 7-gon.
The heptagon is sometimes referred to as the septagon, using "sept-" together with the Greek suffix "-agon" meaning angle. Wikipedia
Angle measure: about 128.57 degrees
Number of edges: 7
Sum of interior angles: 900°
Number of vertices: 7
Rotational symmetry order: 7
Line of symmetry: 7
Symmetry group: order 2×7 and Dihedral (D₇)