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In the diagram below, AB || DF, m/DCE = 104 ° and m/CEF = 145 °. Find m/B. (I put some parts I could figure out, but now I'm stuck).

In the diagram below, AB || DF, m/DCE = 104 ° and m/CEF = 145 °. Find m/B. (I put some parts I could figure out, but now I'm stuck).
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In the diagram below, AB || DF, m/DCE = 104 ° and m/CEF = 145 °. Find m/B.

(I put some parts I could figure out, but now I'm stuck).

In the diagram below, AB || DF, m/DCE = 104 ° and m/CEF = 145 °. Find m/B. (I put-example-1
User Joe Saunders
by
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1 Answer

4 votes
Answer: 76°

Explanation: Line AE=180°, and angle C = 104°. To find its supplementary angle, subtract it from 180. 180-104=76. Using the alternate interior angle theorem, you can conclude that angle B also equals 76°
User Maulik J
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