Answer:
f = 65
s = 144
t = 144
u = 77
Explanation:
the sum of a triangles angles will always be 180
so we can subtract 37 and 78 from 180 to find f which is 65
in regards to s and t, the sum of those 4 angles will be 360, and we can assume the opposite sides of the angles are the same.
so the other side of the 36 angle will also be 36, so we subtract 36 and 36 from from 380 which gives us 288
then we divide it by 2 because we have 2 unknown angles that are the same size, then we get 144 for s and 144 for t
the sum of the angles of a polygon will always be 360
so we can subtract 86 and 53 and t (which we now know is 144) from 360 to find u
so u = 77