Question

PLEASE ANSWER QUICKLY

Answer 1

If we assume the two smaller triangles in the larger triangle are similar because they share a side, then p=27. 

29-11=18 would give us the value for the lower side of the rightmost triangle. Then was can use a ratio to compare the outer sides of both inner triangles.

16.5/11 = x/18
x=27

Answer 2

29-11=18
18²+18²=p²
324+324=p²
p²=648
p=18√2
That's your answer.