Respuesta :

mADC=360-mABC=360-184=176⁰

So, measure of angle ABC= mADC/2=176/2=88⁰

Answer: 88°

Step-by-step explanation:

ABCD equals 360°

ABC equals 184

360 - 184 = 176

176/2 = 88

ANOTHER WAY TO CHECK

Rotate the figure straight up, and examine it closely to see that it's a little less than 90°

You see, it is not 90° or 92°, and the change is too small to be 84°. So we determine it's 88 by looking at it NOTE, THIS WILL NOT ALWAYS WORK BECAUSE THE EQUATION IS DIFFERENT THAN THE PICTURE IT'S SUPPOSED TO MATCH.