Question

please tell step by step​

Answer 1

Answer:

because AB I I CD

Angle ABC = Angle BCD

so

Angle BCD = 100

hope the answer is correct

Answer 2

Answer:

Since AB || CD,

1) m (angle BCD) = 100 degrees ...... ( alternate angle theorem)

2) since DE || OX,

m (angle x) =60 degrees ........ ( interior angles theorem ) .... (1)

3) angle y. = angle x..... (vertically opposite angles )

angle y = 60 degrees ..... from (1)

4) z +y+