Its internal angles total 720 degrees
Else clues• Allen wrench cross section
• Basis of apian architecture
• Benzene ring shape (7)
• Certain polygon
• Common nut shape
• Figure that shares a property with this puzzle
• Geometric shape
• Honeycomb shape
• Nut's shape
• Oh, a Gen-X figure
• Six-sided figure
• Snowflake's shape
• A six-sided polygon