See if you can find the degree measurements for ? ABD, ? ACD, and ? ADB. Type your answers into the text boxes, and then click Continue.
? ABD =110
? ADB = 25
Now consider ? ABD. The interior angles of this triangle must also sum to 180°. We found that ? ABD = 110°, so 110° + ? ADB + 45° = 180°, or ? ADB = 25°.
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