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Math: Chapter 9 "Geometry: Investigating Patterns"

Understanding and Using the Vocabulary

AB
a line dividing a shape into two matching halvesline of symmetry
a six-sided figurehexagon
a polygon with all sides and angles congruentregular ploygon
a quadrilateral with opposite sides parallelparallelogram
a simple closed figure fromed by three or more sidespolygon
a ruler or any object with a straight sidestaightedge
the point where two edges of a polygon intersectvertex
the most common unit of measure for an angledegree
an angle whose measure is between 0 and 90 degreesacute angle
an angle whose measure is between 90 and 180 degreesobtuse angle

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