Question

Please help! ABCD is a parallelogram if CDA equals 57 then what does BCD =?

Answer 1

∠ BCD = 123°

Explanation:

adjacent angles are supplementary , sum to 180°

∠ CDA and ∠ BCD are adjacent angles , then

∠ BCD + 57° = 180° ( subtract 57° from both sides )

∠ BCD = 123°