Download - Ppt -welcome to the world of polygons
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Welcome to the world of polygons
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A polygon is a closed figure having three or more sides joined by straight lines.
The word ‘polygon’ is a Greek word. Poly means many andgon means
angle.
Polygon?
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There are different polygons. The following slides are looking at the
polygons like triangle, quadrilateral, pentagon, hexagon, heptagon,
octagon, nonagon, decagon and also consider regular polygon and irregular
polygon
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TrianglesA triangle is the simplest polygon.Triangles have only three sides.There are several different types of triangles.The sum of the angle of a triangle is 180 degree.
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Quadrilateral A quadrilateral is a four sided polygon.
There are several types quadrilateral such as rectangle, square, parallelogram, rhombus etc.
The sum of the angle of a quadrilateral is 360 degree.
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PentagonA pentagon is a five sided polygon.
The sum of the angles of a pentagon is 540 degree.
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HexagonA hexagon is a six sided polygon.
The sum of the angles of a hexagon is 720 degree.
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Heptagon A heptagon is a seven sided polygon.
The sum of the angles of a heptagon is 900 degree.
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Octagon An octagon is an eight sided polygon.
The sum of the angles of an octagon is 1080 degree.
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Nonagon
A nonagon is a nine sided polygon.The sum of the angles of a nonagon is 1260
degree.
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DecagonA decagon is a ten sided polygon .
The sum of the angles of a decagon is 1440 degree.
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Regular PolygonA polygon with equal sides and equal angles.Example :- Equilateral triangles, square,
regular pentagon etc.
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Irregular PolygonIn an irregular polygon, one or more sides
do not equal to the length of the others.
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