The odd one out is the cube which is a 3D shape whereas the rest are 2D shapes if that is your question.
An equilateral triangle, a square, a hexagon, a pentagon, a decagon, an octagon, the list goes on and on.
Octagon.
triangle
Why
There are many regular polygons like the square, pentagon, hexagon, and octagon
Triangle
A straight line, a triangle, an octagon, a pentagon, a hexagon a square a rectangle a.........
triangle circle square octagon pentagon hexagon trapezoid
They are a miscellaneous collection of polygons.
An equilateral triangle, a square, a hexagon, a pentagon, a decagon, an octagon, the list goes on and on.
Octagon.
Of the four shapes mentioned, the octagon has the most sides. Square has 4 sides, hexagon has 6, pentagon has 5, and the octagon has 8.
triangle
What about on ?TrianglE, SquarE, PentagoN, HexagoN, HeptagoN, OctagoN.
Square
Why
1. square 2. hexagon 3. pentagon 4. rectangle 5. triangle 6. circle 7. octagon