Deathbat1999 Deathbat1999

14-12-2017
Mathematics

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BCDE is a parallelogram.

What is the measure of ∠BEC?

Enter your answer in the box.

BCDE is a parallelogram What is the measure of BEC Enter your answer in the box class=

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StellarStephanie StellarStephanie

14-12-2017

The answer is 80, because that is what you get when you subtract 100 from 180 to get the third angle.

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koziadam koziadam

14-12-2017

80 degrees.

<CBE and <BED are co-interior angles.
Let <BEC = x

60 + (x + 40) = 180
x = 80

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