Elena needs to prove angles BED and BCA are congruent. Provide reasons to support each of her statements. B
m D
E
E
А
С
Angles BED and BCA are congruent.

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5) x=30

6) x=50

7) x=59

8) x=31

9) m<1=75 because they're corresponding and m<2=105 because it's supplementary with the 75 degrees angle

10) m<1= 120 because they're corresponding and m<2=60 because they're consecutive interior angles and add up to 180

in questions 5-7 you just set them equal to each other

in 8, you had to subtract 105 from 180 and then set 75 equal to 3x-18