Answer:
GE
Step-by-step explanation:
4) 21
5) 36
6) 29.25
I used porpotions on all of these.
Sorry I don't remember the units.
Its 17, because i made a graph
If an angle it is obtuse it is between 90 and 180.
Angles in a quadrilateral add up to 360.
Therefore 3 obtuse angles must add up to AT LEAST 273 and if you then added the 90 it would get you to 363 which is too large so it cant be 90 :)
