For rectangle ABCD, find m∠ADB.

Answer:
we know all angles are 90° in the rectangle
therefore, angle d = bdc+bda = 90
=> 31+bda = 90
=>angle bda= 59
The measurement of the angle ADB should be considered as the 59 degrees.
Since we know that all angles in the rectangle should be of 90 degrees
So,
Here angle d = bdc + bda
= 90
Now
31 + bda = 90
So, bda = 90 - 31
= 59
hence, The measurement of the angle ADB should be considered as the 59 degrees.
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