The angle does not matter. Think of it as finding the other side to a triangle. Use

a=39 (line AB)
b=b (the leg we need to find)
c=89 (line BD)


(subtract the 1521 from both sides)

(square root both sides)

b = 80
AD=80
Answer:
I just summited it, it was "Her mean grade would go up".
Step-by-step explanation:
45 black dogs because 2/3 of 60 is 45
Answer:
No
Step-by-step explanation:
That is not enough,that is why it is a no
PLs mark brainly
Hope this helps:)