Answer:
? = 27
Step-by-step explanation:
Keep in mind that all angles in a triangle equal 180
Add up all the known angles in triangle 1
90 + 33 = 123
and subtract it by 180 to find the third angle
180 - 123 = 57
then subtract 57 by 90 to find the other side of 90 degree angle the to triangles share
90 - 57 = 33
next add the angle we just found by 120
120 + 33 = 153
finally subtract 180 by 153
180 - 153 = 27
