Polygons Polygon Definition A polygon is a closed figure in a plane formed by connecting line segments endpoint to endpoint Each segment intersects exactly two others Side vertex Polygons ID: 554201
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1.4 PolygonsSlide2
Polygon Definition: A polygon is a closed figure in a plane, formed by connecting line segments endpoint to endpoint. Each segment intersects exactly two others.
Side
vertexSlide3
Polygons!
SidesName3
Triangle4Quadrilateral
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Pentagon
Hexagon
Heptagon
Octagon
Nonagon
Decagon
Undecagon
Dodecagon
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gonSlide4
DiagonalDefinition: A diagonal of a polygon is a line segment that connects two non-consecutive vertices. Slide5
Convex vs. Concave A polygon is convex if no diagonal is outside the polygon. A polygon is concave if at least one diagonal is outside the polygon.
Convex polygons
Concave polygonsSlide6
Congruent PolygonsIf polygons are congruent, then the corresponding sides and angles are congruent
.If the corresponding sides and angles are congruent, then the polygons are congruent. Slide7
Your task…Create quality definitions for the three terms on page 56. Add them to your yellow definition pages. When finished you may begin on today’s assignment:
1.4 #1-18, 20-24, 27Slide8
Equilateral PolygonsPolygons in which all sides have equal length.
Equiangular Polygons
Polygons in which all angles have equal measure.
Regular PolygonsPolygons that are both equilateral and equiangular.