Polygons Poly means many gon means side So

Polygons

• Poly means many • gon means side • So polygons means many sides

• A polygon must only be made of straight sides. • The shape must be closed.

These are polygons.

These are not polygons.

Regular polygons have all sides the same length.

In this case regular is the opposite of irregular. What does irregular in clothing mean? Badly stitched in some small area, wrong sizing. The rejects from the good clothes basically.

This are irregular polygons.

Tri means 3 • Triangles have 3 sides.

triplets

tricycle

trio

trident

triathlon

triple

triceratops

quad means 4 • Quadrilaterals have 4 sides.

quadruple • 4 x

quadriceps

quadruplets

quadriplegic

quadrunner

penta means 5 • Pentagons have 5 sides.

pentagon

Pentathlon 5 events show jumping fencing shooting swimming running

pentagonal star

Pentateuch • First 5 books of the Bible

Hex means 6 • Hexagons have 6 sides.

Hex head bolts

Hex head nuts

6 equilateral triangles together make a hexagon.

Oct means 8 • Octagons have 8 sides.

octave • 8 notes • do, re, me, fa, so, la, ti , do

octopus

octogenarian • Someone in their 80’s

October used to be the 8 th month

Triangle Quadrilateral Pentagon Hexagon Octagon

Triangle Quadrilateral Pentagon Hexagon Octagon

Triangle Quadrilateral Pentagon Hexagon Octagon

Triangle Quadrilateral Pentagon Hexagon Octagon

Triangle Quadrilateral Pentagon Hexagon Octagon

Triangle Quadrilateral Pentagon Hexagon Octagon

Triangle Quadrilateral Pentagon Hexagon Octagon

Triangle Quadrilateral Pentagon Hexagon Octagon

Triangle Quadrilateral Pentagon Hexagon Octagon

Triangle Quadrilateral Pentagon Hexagon Octagon

Triangle Quadrilateral Pentagon Hexagon Octagon

Triangle Quadrilateral Pentagon Hexagon Octagon

Triangle Quadrilateral Pentagon Hexagon Octagon

Triangle Quadrilateral Pentagon Hexagon Octagon

Triangle Quadrilateral Pentagon Hexagon Octagon

Triangle Quadrilateral Pentagon Hexagon Octagon

Triangle Quadrilateral Pentagon Hexagon Octagon

Triangle Quadrilateral Pentagon Hexagon Octagon

Triangle Quadrilateral Pentagon Hexagon Octagon

Triangle Quadrilateral Pentagon Hexagon Octagon

Triangle Quadrilateral Pentagon Hexagon Octagon

Triangle Quadrilateral Pentagon Hexagon Octagon

The End?