Rectangle
4 right angles (find one for coordinate proofs)
Diagonals are congruent
Rhombus
All side congruent (find one in coordinate proofs)
Diagonals are perpendicular
Diagonals bisect angles
Square
All properties of square and rhombus
Use sides for coordinate proofs
Trapezoid
Exactly one pair of parallel sides = bases
Non parallel sides = legs
Formula for midsegment of trapezoid
1/2(base1+base2)
Isosceles trapezoid
Base angles congruent
Legs congruent
Kite
2 pairs of consecutive sides congruent
1 pair of opposite angles congruent
Diagonals perpendicular
Area trapezoid
1/2(b1+b2)h
Area kite
1/2(d1 x d2)
Parallelogram
Diagonals bisect each other (use for coordinate proofs)
2 pairs of parallel / congruent(opposite) sides
Opposite angles congruent
Consecutive angles supplementary