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What is the measure of ∠b
?

What is the measure of ∠b ?-example-1
User Novacara
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the first thing you would do is subtract 143 (or angle measurement over 90 degrees but not 180) by 180. It would be 37 degrees. If there were more letter angle names then the letter a and c would be the same, and b and d would be the same.

User Nasar Kushnir
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