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Quadrilaterals

SOL 7.6 a) compare and contrast quadrilaterals based on their properties

TermDefinition
polygon a closed plane figure composed of at least three line segments that do not cross
quadrilateral a polygon with four sides
diagonal a segment in a polygon that connects two vertices but is not a side
bisect means to divide into two equal parts
lines of symmetry divides a figure into two congruent parts each of which is the mirror image of the other
parallelogram a quadrilateral with both pairs of opposite sides parallel
properties of a parallelogram - opposite sides are parallel and congruent; - opposite angles are congruent; and - diagonals bisect each other and one diagonal divides the figure into two congruent triangles
rectangle quadrilateral with four right angles
properties of a rectangle - opposite sides are parallel and congruent; - all four angles are congruent and each angle measures 90; and - diagonals are congruent and bisect each other.
square a quadrilateral that is a regular polygon with four congruent sides and four right angles
properties of a square - opposite sides are congruent and parallel; - all four angles are congruent and each angle measures 90; and - diagonals are congruent and bisect each other at right angles.
Number of lines of symmetry in a square 4
Number of lines of symmetry in a parallelogram (not a rectangle or rhombus) 0
Number of lines symmetry in a rectangle and rhombus 2
Created by: LCPSitrt