Solutions A plane figure with four straight sides and four right angles has 6 entries with similar clues
- polygonAny plane figure with straight sides
- hexagonPlane figure with six straight sides and angles
- heptagonA plane figure with seven straight sides and seven angles
- pentagonA plane figure with five straight sides and five angles
- dodecagonA plane figure with twelve straight sides and twelve angles
- hendecagonA plane figure with eleven straight sides and eleven angles