The calculated measure of the angle ABD is 40 degrees
How to determine the measure of the angle ABD
From the question, we have the following parameters that can be used in our computation:
mBAD = 50 degrees
Also, we have
mACD = 35 degrees
Given that AD is an altitude
Then, by the sum of angles in a triangle, we have
mABD + mBAD + 90 = 180
Substitute the known values into the equation
mABD + 50+ 90 = 180
mABD + 140 = 180
So, we have
mABD = 40
Hence, the measure of the angle ABD is 40 degrees