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Two-Secant Angle Theorem:

measure of Angle B = 1/2 (arc ADC - arc EF)

m∠B = 1/2 (160° - 80°)

m∠B = 1/2 (80°)

m∠B = 40°
brainly doesnt want my request so I offer facebook, convenient than brainly my points here are not good
If I answer based on points, I will not choose this problem. Maybe you can upload again, but as different question? Since this is a community of users helping others for free, we have to follow Brainly's rules :-) Try answering one of the questions here, maybe an easy one to gain points. Then post your question:-) I hope this advice helps.
Post comments in my profile page:-)
.. on my profile page :-)
still dont wabt