Given: Parallelogram LMNO; MO ⊥ LN
transitive propertysubstitution property✔ reflexive propertysymmetric property
Opposite angles of a parallelogram are congruent.✔ Opposite sides of a parallelogram are congruent.Diagonals of a parallelogram are congruent.Diagonals of a parallelogram bisect each other.
Given: ABCD is a rectangle. Prove: ABCD has congruent diagonals.
✔ SASAASCPCTC
✔ CPCTCSASAAS
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