hexagon40.gifThe triangles name is that because tri means three and the triangle has three sides.
square40.gifa square has its name because it has four sides that makes a square.
pentagon40.gifa pentagon has 5 side thats why it has the name pentagon penta means 5.
octagon40.gifoctagon has its name because it has eight sides oct means 8 you can also think of an octopus
hexagon40lr.gifhexagon hex mean six so the hexagon has six sides