Given that ABCD is a parallelogram. What must be true? What may be true? What can’t be true? ∠C is supplementary to both ∠B and ∠D ∠A is supplementary to both ∠B and ∠D AB¯¯¯¯¯¯¯¯⊥AD¯¯¯¯¯¯¯¯ AD¯¯¯¯¯¯¯¯≅BC¯¯¯¯¯¯¯¯ AD¯¯¯¯¯¯¯¯∥BC¯¯¯¯¯¯¯¯ AB¯¯¯¯¯¯¯¯≅AD¯¯¯¯¯¯¯¯ AC¯¯¯¯¯¯¯¯ bisects BD¯¯¯¯¯¯¯¯ AB¯¯¯¯¯¯¯¯∥CD¯¯¯¯¯¯¯¯ ∠A≅∠C AB¯¯¯¯¯¯¯¯≅CD¯¯¯¯¯¯¯¯ ABCD is a square BD¯¯¯¯¯¯¯¯ bisects AC¯¯¯¯¯¯¯¯ ABCD is a kite ABCD is a rhombus m∠A=90° ∠B≅∠D AB¯¯¯¯¯¯¯¯ intersects CD¯¯¯¯¯¯¯¯ AD¯¯¯¯¯¯¯¯ intersects BC¯¯¯¯¯¯¯¯ AC¯¯¯¯¯¯¯¯≅BD¯¯¯¯¯¯¯¯ ABCD is a rectangle ∠A≅∠B English