7-4 Quadrilaterals & Other Polygons Flashcards
quadrilateral
a polygon with 4 sides
How do you classify polygons?
by the number of sides
polygon
A closed figure formed by 3 or more line segments that do not cross.
hexagon
a polygon with 6 sides
triangle
a polygon with 3 sides
pentagon
a polygon with 5 sides
octagon
a polygon with 8 sides
decagon
a polygon with 10 sides
regular polygon
a polygon with all sides congruent (equal) and all angles congruent (equal)
irregular polygon
a polygon with all sides NOT congruent (not equal) and all angles NOT congruent (not equal)
trapezoid
a quadrilateral with exactly 1 pair of parallel sides. the arrows indicate parallel sides
parallellogram
is a quadrilateral with both pairs of opposite sides parallel
rectangle
a parallelogram with four right angles
rhombus
a parallelogram with four congruent sides
square
a parallelogram with four right angles and four congruent sides
