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# Math Vocab - Unit 3

TermDefinition
polygon a simple closed figure containing three or more line segments
regular polygon a polygon in which all sides and angles are the same
similar figures with the same shape but not the same size
congruent having the same size and shape
triangle a three-sided polygon; the sum of all angles total 180 degrees
quadrilateral a four-sided polygon; the sum of all the angles total 360 degrees
rectangle a quadrilateral with the opposite sides that are congruent and 4 right angles
rhombus a quadrilateral and a parallelogram with 4 congruent sides, usually does not have right angles
square a quadrilateral with 4 equal sides and 4 right angles
trapezoid a quadrilateral with only one pair of parallel sides
pentagon a 5 sided polygon
hexagon a 6 sided polygon
heptagon a 7 sided polygon
octagon an 8 sided polygon
nonagon a 9 sided polygon
decagon a 10 sided polygon
Created by: dcs