Ac is a diameter of d. if m bdc = 45°, what is the measure of ab?

45°
135°
180°
155°

(i think it's either b or d)

135°

Step-by-step explanation:

The AC line is the diameter of the circle, and it is a straight line so the angle AC measures 180 °.

The image tells us that the angle BDC measures 45 °, so to find the angle AB we must subtract to the measure of the angle AC the measure of the BDC: agulo:

AC - BDC = 180 ° - 45 ° = 135 °

b is 38 degrees.

a is 52 degrees.

this is because if b is 38 and a is 14 degrees more than b than 38+14=52 and 52+38=90 degrees. hope this .

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step-by-step explanation: