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## POLYGONS

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**POLYGONS**“MANY” “SIDES”**This means that polygons have both length and width.**L E N G T H WIDTH**Polygons are closed shapes, and they are made of at least 3**line segments.**However, this is a special type of polygon called**“concave.”**It’s called “concave” because some of the sides are**“caved in.”**For our purposes, we will be discussing only convex polygons**and not concave polygons.**That’s a trick question. There is no such thing as a**one-sided polygon. Remember, polygons must have at least 3 sides.**You can remember the prefix “tri” by thinking of a**tricycle. A tricycle has 3 wheels.**You can remember the prefix “quad” by thinking “times**four.” Quadruple means x 4**You can remember this name by thinking about the building in**Washington, D.C.**You can remember that a hexagon has six sides because the**words hexagon and six both have the letter “x.”**You can remember the prefix “hept” by thinking of the**heptathalon in the Olympics. heptathlon—a two-day event in which athletes compete in the 100-meter hurdles, high jump, shot put, and 200-meter dash on the first day and in the long jump, javelin, and 800-meter race on the second day.**Joyner-Kersee, JackieJoyner-Kersee, Jackie (1962- ),**American track-and-field athlete, who won the heptathlon event (an all-around event) at the Olympic Games in 1988 and 1992. She is considered one of the greatest female athletes.**You can remember the prefix “oct” by thinking of an**octopus.**You can remember that a nonagon has nine sides because the**words nonagon and nine both have two “ns.”**You can remember the prefix “dec” by thinking about a**decade. 2000 1999 1998 1997 1996 1995 TEN YEARS 1994 1993 1992 1991