1. Tri- (Three)
* Trident: A three-pronged spear, often associated with Poseidon, the Greek god of the sea.
* Tricycle: A three-wheeled vehicle, often used by children.
* Triangle: A three-sided geometric shape.
* Trilogy: A set of three literary or musical works, often connected by theme or character.
* Tripartite: Involving three parties or parts.
2. Quad- (Four)
* Quadriceps: A group of four muscles at the front of the thigh.
* Quadruped: An animal with four legs.
* Quadrangle: A four-sided courtyard or open space.
* Quadrant: One of four equal sections of a circle.
* Quadruple: To increase fourfold.
3. Penta- (Five)
* Pentagon: A five-sided geometric shape.
* Pentagram: A five-pointed star, often used as a symbol.
* Pentathlon: An athletic contest with five events.
* Penthouse: An apartment on the top floor of a building, often luxurious.
* Pentameter: A line of poetry with five metrical feet.
4. Hexa- (Six)
* Hexagon: A six-sided geometric shape.
* Hexadecimal: A number system based on 16, often used in computing.
* Hexameter: A line of poetry with six metrical feet.
* Hexapod: An insect with six legs.
* Hexahedron: A polyhedron with six faces, like a cube.
5. Hepta- (Seven)
* Heptagon: A seven-sided geometric shape.
* Heptameter: A line of poetry with seven metrical feet.
* Heptad: A group of seven.
6. Octa- (Eight)
* Octagon: An eight-sided geometric shape.
* Octave: An interval of eight notes in music.
* Octopus: A cephalopod with eight arms.
* Octal: A number system based on eight.
* Octahedron: A polyhedron with eight faces.
7. Nona- (Nine)
* Nonagon: A nine-sided geometric shape.
* Nonet: A musical ensemble with nine members.
8. Deca- (Ten)
* Decagon: A ten-sided geometric shape.
* Decathlon: An athletic contest with ten events.
* Decade: A period of ten years.
* Decameron: A collection of 100 stories written by Giovanni Boccaccio.
9. Dodeca- (Twelve)
* Dodecagon: A twelve-sided geometric shape.
* Dodecahedron: A polyhedron with twelve faces.
These are just a few examples. The prefixes related to polygons are used to form a wide range of words in various fields.