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parallelgram
use one of the following :
diagonals bisect each other
both pairs of opposite sides are parallel
both pairs of opposite sides are congruent
one pair of opposite sides are parallel and congruent
Rectangle
One of ways to prove a parallelogram and one of the following :
one right angle
diagonals are congruent
Rhombus
One of ways to prove a parallelogram and one of the following :
Diagonals are perpendicular
two adjacent sides are congruent
Square
prove figure is a rectangle (you must prove parallelogram first) and two adjacent sides are congruent
or
prove figure is a rhombus (you must prove parallelogram first) and has one right angle
Trapezoid
prove one pair of opposite sides are Parallel and the other pair of opposite sides are not parallel
Isosceles Trapezoid
Prove the figure is a Trapezoid and one of the following:
legs are congruent
Diagonals are congruent
Kite
prove 2 consecutive sides are congruent and opposite sides are not congruent
to prove line segments are congruent
use distance formula / d= (x2-x1)2 + (y2-y1)2
to prove lines parallel or perpendicular
use slope formula/
to prove line segments bisect each other
use midpoint formula/ Mx= x1 + x2 / 2
Right trapezoid
prove figure is a trapezoid and one leg is perpendicular to a base