Finding the measure of an angle using angle addition theorem

The video tutorial explains how to solve a geometry problem involving angles. It introduces the problem, identifies the given information, and explains the use of variables and expressions. The angle sum theorem is applied to set up an equation, which is then solved to find the value of the variable X. Finally, the measures of angles ABC and DBC are calculated using the found value of X.

What is the measure of angle Abd?

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What expressions are used to represent the angles in the problem?

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How do you determine the measure of angles ABC and DBC using the angle sum theorem?

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What value of X is found when solving the equation?

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What are the final measures of angles ABC and DBC?

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