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7. In parallelogram ABCD below, AC  is a diagonal, the
measure of ∠ABC is 40°, and the measure of ∠ACD is
57°. What is the measure of ∠CAD ?

 

  • A. 40° 

  • B. 57°

  • C. 77° 

  • D. 83°

  • E. 97°