| A | B |
|---|
| parrelellogram properties | opp sides congruent and ll, opp angles congruent, diags bisect each other, any s-side <'s supp |
| rectangle properties | all props of llogram, all <'s right angles, diags congruent |
| kite properties | disjoint sides =, diagonals perpendicular, one diag perp. bis. of other, one diag bisects pair of opp <'s, and one pair opp <'s = |
| rhombus properties | all llogram props, diags perp bis's of each other, diags bisect angles, all angles congruent, all sides congruent, diags divide into 4 = rt triangles |
| square properties | all rect and rhombus properties, diagonals form 4 isosc. right triangles |
| isosceles trapezoid properties | legs congruent, bases ll, correspoding base <'s =, diagnols =, any lower base < = to any upper base < |
| ways to prove quadrilateral llogram | if both pairs opp sides ll, if both pairs opp sides =, if one pair opp sides = and ll, if diagonals bis each other, if both pairs opp <'s = |
| proving quad to be a rectangle if know is a llogram | is contains at least one rt <, if diagonals are = |
| proving a quad a rectangle w/out knowing if is a llogram | if all 4 <'s are rt |
| proving a quad to be a kite | if corresponding sides are = if one of diagonals is perp bis of other |
| proving quad to be a rhombus knowing it's a llogram | if contains pair consecutive sides =, if either diagonal bisects 2 angles of the llogram |
| proving a quad a rhombus w/out knowing its a llogram | if diagonals are perp bis. of each other |
| proving a quad to be a square | if its both a rectangle and a rhombus |
| proving a trapezoid to be isosceles | if nonparralell sides are =, if lower or upper base <'s are =, if diagonals are = |
