Lesson (1-6): Polygons_ p: 45 A polygon is a closed figure whose sides are all segments that...
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Transcript of Lesson (1-6): Polygons_ p: 45 A polygon is a closed figure whose sides are all segments that...
![Page 1: Lesson (1-6): Polygons_ p: 45 A polygon is a closed figure whose sides are all segments that intersect only at their endpoints examples polygonnot a polygon:](https://reader035.fdocuments.in/reader035/viewer/2022072014/56649eb05503460f94bb5de7/html5/thumbnails/1.jpg)
Lesson (1-6): Polygons_ p: 45
A polygon is a closed figure whose sides are all segments that intersect only at their endpoints
examples
polygon not a polygon:curved
not a polygon:open
![Page 2: Lesson (1-6): Polygons_ p: 45 A polygon is a closed figure whose sides are all segments that intersect only at their endpoints examples polygonnot a polygon:](https://reader035.fdocuments.in/reader035/viewer/2022072014/56649eb05503460f94bb5de7/html5/thumbnails/2.jpg)
Names of polygons
number of sides
polygon
3 triangle
4quadrilateral
5pentagon
6hexagon
7heptagon
8octagon
9nonagon
10decagon
quadrilateral
hexagon
![Page 3: Lesson (1-6): Polygons_ p: 45 A polygon is a closed figure whose sides are all segments that intersect only at their endpoints examples polygonnot a polygon:](https://reader035.fdocuments.in/reader035/viewer/2022072014/56649eb05503460f94bb5de7/html5/thumbnails/3.jpg)
Convex and Concave Polygons
- If all lines drawn across a polygon cut it in exactly 2 points, then it is convex
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- If one line drawn across it cuts it in more than 2 points, then it is concave
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![Page 4: Lesson (1-6): Polygons_ p: 45 A polygon is a closed figure whose sides are all segments that intersect only at their endpoints examples polygonnot a polygon:](https://reader035.fdocuments.in/reader035/viewer/2022072014/56649eb05503460f94bb5de7/html5/thumbnails/4.jpg)
-If all sides and angles of a polygon are equal, then it is regular
Regular and Irregular Polygons
- If not all sides and angles of a polygon are equal, then it is irregular
![Page 5: Lesson (1-6): Polygons_ p: 45 A polygon is a closed figure whose sides are all segments that intersect only at their endpoints examples polygonnot a polygon:](https://reader035.fdocuments.in/reader035/viewer/2022072014/56649eb05503460f94bb5de7/html5/thumbnails/5.jpg)
It is the sum of the measures of the sides of the polygon
Perimeter
22 2
2
22
22
10
10
5 5 P= 2+2+10+2+2+5+2+2+10+2+2+5=46