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Home > GC > Chapter 6 > Lesson 6.2.4 > Problem 6-73


In the diagram below, bisects . This means that divides the angle into two equal parts. If and if , solve for . Then find .

Ray B, D bisects angle A, B, C,.

If  divides  into two equal parts, what can you do with the equations for their measures?

Once you have solved for , substitute it back into the expressions of each angle.
How can you use those measures to find the measure of ?