Here's how it works:
* Polygon: A closed shape with multiple sides and angles. "Poly" means "many" and "gon" refers to the angles.
* Triangle: A shape with three sides and three angles. "Tri" means "three".
* Quadrilateral: A shape with four sides and four angles. "Quad" means "four".
* Pentagon: A shape with five sides and five angles. "Penta" means "five".
* Hexagon: A shape with six sides and six angles. "Hexa" means "six".
And so on...
So, when you see "-gon" at the end of a word, it's a hint that you're dealing with a shape defined by its angles.