Line-segments AB and CD bisect each other at O. Join AC and BD to form ΔAOC and ΔBOD. Then, which of the following statements is correct?
1
ΔAOC and ΔBOD are congruent by AAS congruence criterion.
2
ΔAOC and ΔBOD are congruent by SAS congruence criterion.
3
ΔAOC and ΔBOD are congruent by SSS congruence criterion.
4
ΔAOC and ΔBOD are congruent by ASA congruence criterion.