
What is the measure of ZACB ?
Answer:
Your Answer Would be 90° Or 180° My friend!
A triangle's angles add up to 180 degrees because one exterior angle is equal to the sum of the other two angles in the triangle.
Hope this Helps!!!

(72/80)x90=81
Divide seventy-two by eight and multiply it Ninety.
19,765 but couldnt u just use a calculator??
Divide both sides by l. Hope this helps! :D