3) Smallest angle = Q
Middle angle = R
Largest angle = P
4) Here both smaller and larger triangle is "isosceles" in nature.
So, sum would be 180 with two equal sides.
66 + BDE + BED = 180
2 BDE = 180 - 66
BDE = 114 / 2
BDE = 57
In short, Every four angles would be equal to 57
Hope this helps!
