Answer:
b
Step-by-step explanation:
make scence
yes; you can just remember that all the angles on a triangle equal 180 so just add the two angles, subtract from 180 to get your last angle degrees.
25%
10(450/1800)
The answer is 2.5
The next blank is 6
15/3=12/AB
15AB=36
AB=2.4 is the answer