PolygonsPolygonsWhat are they?What are they?

PolygonsPolygons There are both irregular and regular There are both irregular and regular

polygonspolygons Polygons are shapes with a face, three or Polygons are shapes with a face, three or

more sides and is a closed figuremore sides and is a closed figure There are also polygons called convex and There are also polygons called convex and

concaveconcave Polygons come in many different shapesPolygons come in many different shapes Although polygons that are round like a Although polygons that are round like a

circle (or shapes that do not have all circle (or shapes that do not have all straight lines) are not polygons straight lines) are not polygons

Regular PolygonsRegular Polygons Regular polygons have equal sides and Regular polygons have equal sides and

angles all the way aroundangles all the way aroundRegular Triangle

Irregular Polygons Irregular polygons have unequal sides

although some irregular polygons have equal angles

Irregular Heptagon

Rectangle (irregular)

Triangle Pentagon Hexagon Heptagon

Octagon Nonagon Decagon Undecagon

Dodecagon Tridecagon Tetradecagon Pentadecagon

Trapezoid

Right Triangle Parallelogram

Rectangle

Regular Polygons

Irregular Polygons

s = sides

3 s 5 s 6 s 7 s

8 s 9 s 10 s 11 s

12 s 13 s 14 s 15 s

4 s

3 s4 s

4 s

Concave Concave PolygonPolygon

Convex polygons are Convex polygons are shapes that curve out shapes that curve out of a usual shape (or of a usual shape (or just does not have a just does not have a dent in it)dent in it)

Concave polygons are Concave polygons are shapes that curve shapes that curve inward (if you can inward (if you can draw a straight line draw a straight line from inside one part from inside one part of the shape going of the shape going out of the shape then out of the shape then inside again to the inside again to the other side, it is other side, it is concave) concave)

Convex Polygon

1- regular triangle

2- irregular hexagon