12. Study the marking on each figure and decided whether ABCD must
be a parallelogram. If the answer is yes, state the definition or
theorem that applies
13. Study the marking on each figure and decided whether ABCD must
be a parallelogram. If the answer is yes, state the definition or
theorem that applies
14. Study the marking on each figure and decided whether ABCD must
be a parallelogram. If the answer is yes, state the definition or
theorem that applies
16. CW Complete #1-15 show all work. Complete
on the back or separate sheet.