11: B
12: C
They are both supplementary angles meaning they add to 180 degrees
I think it would be 3569 , i’m not sure tho.
Answer is (d) P, Q , R
Any triangle has 3 vertices , after which its name is justified
-7-w<10
Add 7 to each side
-w<17
Change signs and flip sign
w>17
Hope this helps :)
I’m pretty sure the answer is (2,1)
