Respuesta :

The answer is 39 because the measurement of CBA is 90 so if CBD is 51 then u have to take away 51 out of 90
thetide5

Answer: 39°

Step-by-step explanation:

This is a right triangle, meaning one of the angles is a 90° angle. Angle CBA in this case is the 90° angle. In order to figure out the measure of ABD, you subtract the measure of CBA by the measure of CBD, which is 51°.

90 - 51 = 39

Thus, the measure of ABD is 39°

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