<BCD and <CDA are consecutive angles. Consecutive angles of a parallelogram are supplementary (they add to 180 degrees), so.
m<CDA + m<BCD = 180
substituting the given value for m<CDA:
66 + m<BCD = 180
m<BCD = 114
Katelyn H.
asked • 02/18/21ABCD is a parallelogram, If m<CDA=66, then m<BCD=??
a. 66
b. 124
c. 114
d. 132
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