Question

in the given figure....​

Answer 1

Answer:

80 degrees

Step-by-step explanation:

first, we need to take out the value of ∠ECD,

also, we know that EF is parallel to CD.

∴,  ∠ECD = 180-135 (135 is given)

∴ ∠ECD is 45.

now, we add 35 and 45 to get value of ∠BCD.

∴ ∠BCD = 80

also, AB Is Parallel to CD ,

Therefore, ∠ABC=∠BCD (altenate interior angles)

therefore ∠ABC s 80

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Answer 2

Answer:

angle ABC =80

Step-by-step explanation:

angle CEF +ECD=180

=angle ECD=45

Angle ECD+BCE=angle BCD

=angle BCD=80

angle BCD = angle ABC

ABC = 80