Question

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Answer 1

GIVEN ,

ABCD is a parallelogram

∠A = 125°

∠BCE = 56°

TO FIND ,

∠ECD = y

∠ADC =  x

∠AEC =  z

SOLUTION ,

∠DAB = ∠BCD [ Opposite  angles of parallelogram are equal ]

125° = ∠BCE + ∠ECD

125° = 56° + ∠ECD

∠ECD = 125° - 56°

∠ECD = 69° = y