Question

Find the value of z?​

Answer 1

Answer:

z=60 degree

Step-by-step explanation:

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Answer 2

Answer:

60°

Step-by-step explanation:

angle cda + angle cdb = 180°. (linear pair)

100° + y = 180°

y = 80°

angle cdb + angle cbd + angle dcb = 180°

80° + 40° + z = 180°

z = 60°