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Answer:

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Step-by-step explanation:

Answer:

1. 100 - m = BC =

2. 40 - m∠DCF =

3. 80 - m = CD =

4. 50 - m∠ECB =

Step-by-step explanation:

I found this from DarcySea in this link, https://brainly.com/question/13873884

It's correct.

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