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parallelogram
The big 5
opposite sides are parallel
opposite angles are congruent
opposite sides are congruent
consecutive angles are supplementary
diagonals bisect each other
rectangles
the big 5
diagonals are congruent
4 right angles
rhombus
big 5 from parallelogram
diagonals are perpendicular: form right angles
all sides are congruent
diagonals bisect opposite angles
square
rectangle with two congruent consecutive sides
all sides are congruent
rhombus with 4 right angles
diagonals are congruent and perpendicular
diagonals bisect angles
trapezoid
quadrilateral having only two sides parallel
the pair of parallel sides are called bases
the non-parallel sides are called legs
isosceles trapezoid
legs are congruent
base angles are congruent
diagonals are congruent
midsegment is parallel to the base
right trapezoid
one leg is perpendicular to the bases
kite
quadrilateral with 2 pairs of consecutive sides congruent and no opposite sides congruent
diagonals are perpendicular