alleryParallelogram ABCD has vertices in order. Its diagonals AC,BD meet at O. Which pair of equalities must hold?
AAO=OD and BO=OC
BAO=AC and BO=BD
CAO=BO and OC=OD
DAO=OC and BO=OD
Answer & Solution
Correct answer: D. AO=OC and BO=OD
Each diagonal is bisected at O, so its own two halves match: AO=OC and BO=OD. Different diagonals need not have equal halves.
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