Which word does NOT belong with the others? (a) Square, (b) Pentagon, (c) Hexagon, (d) Angle

• 3-sided triangle
• a square with four sides
• the Pentagon is five-sided
• A hexagon has six sides.
• The heptagon has seven sides.
• The octagon has eight sides.
• A nonagon has nine sides.
• The decagon has ten sides.

Summary:

Which word does NOT belong with the others? (a) Square, (b) Pentagon, (c) Hexagon, (d) Angle

Angle is not a member of the group. From the information given, the two-dimensional shapes are pentagon, hexagon, and square.