
US StandardsAligned
K12 Curriculum Aligned to Stateand Common Core Standards.

IXL Family Membership
Get Started for $9.95/month.Win Prizes, Certificates. Have Fun!

IXL K12 Math Practice
IXL is the Web's Most AdaptiveMath Practice Site. Try it Now!

IXL Teacher Membership
Sign Up for a Free 30Day Trial NowGet Your Students Online in Minutes
A square is a polygon with four sides. A polygon is defined as a closed plane figure with three or more sides. The sides of a polygon are line segments. More »
A polygon riddle is a series of questions or statements about polygons. Each question or statement gives a clue about a certain property of a polygon, and the objective is to guess the shape. Polygon riddles are aimed at... More »
A circle is not a polygon because it does not conform to the definition of a polygon. The definition of a polygon is a closed figure formed by straight lines or straight sides. Although the circle is a closed figure, it ... More »
The point where the sides of a polygon meet is called the vertex. A polygon is a closed plane figure with three or more sides. More »
A polygon with 10 sides is called a decagon. The word comes from the Greek words for "ten" ("deka") and for "angle" or "corner" ("gonia"). Decagons have 10 angles and 10 sides. More »
A polygon with seven sides is called a heptagon. A polygon is a closed geometric shape that has at least three sides and angles. More »
A nonagon, also called an enneagon, is a polygon with nine sides. The name comes partially from the Latin word for ninth, "nonus." More »

US StandardsAligned
K12 Curriculum Aligned to Stateand Common Core Standards.

IXL Family Membership
Get Started for $9.95/month.Win Prizes, Certificates. Have Fun!

IXL K12 Math Practice
IXL is the Web's Most AdaptiveMath Practice Site. Try it Now!

IXL Teacher Membership
Sign Up for a Free 30Day Trial NowGet Your Students Online in Minutes