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parallelogram
opposite angles equal
opposite sides parallel
opposite sides equal
diag bisect each other
consecutive angles supplementary
rhombuses
all sides equal
diags perp (use pythags)
diags bisect angles
is a parallelogram
rectangles
1.diags equal
2.all angles equal (90)
squares
opposite angles equal
opposite sides parallel
opposite sides equal
diag bisect each other
consecutive angles supplementary
all sides equal
diags perp (use pythags)
diags bisect angles
diags equal
all angles equal (90)
how to find measures of interior angles
n-2×180/n
how to find measures of exterior angles
360/n