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## What is a polygon?

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**a closed figure made by joining line segments**Each line segment intersects exactly two others. line segments do not intersect What is a polygon? *All images are either original artwork or are used with permission from Microsoft Word and Microsoft Online Design Gallery.**Are these figures polygons?**yes no yes no**A regular polygon is a polygon whose sides are all the same**length and whose angles are all the same. What is a regular polygon?**The sides are not all the same length.**The angles are not all the same. These are not examples of regular polygons.**triangle**What is a three-sided polygon? Let’s look at some different kinds of polygons.**parallelogram**What is a four-sided figure whose opposite sides are parallel? Polygons**rectangle**What is a four-sided polygon whose sides and angles are all the same? Polygons**square**What is a parallelogram or rectangle with four equal sides and angles? Polygons**rhombus**What is a parallelogram whose sides are all the same length? Polygons**trapezoid**What is a four-sided polygon having exactly one pair of parallel lines? Polygons**pentagon**What is a five-sided polygon? Polygons**hexagon**What is a six-sided pentagon? Polygons**heptagon**What is a seven-sided pentagon? Polygons**octagon**What is an eight-sided pentagon? Polygons**regular polygon**triangle parallelogram rectangle square rhombus trapezoid pentagon hexagon heptagon octagon Let’s review the polygons we‘ve learned about today.**Using your geoboards or dot paper, replicate these polygons.**