Answer:
Step-by-step explanation:
<u>Pythagorean Theorem: a² + b² = h²</u>
1)
5² + 12² = h²
h = √169
h = 13
2)
a² + 12² = 15²
a² = 15² - 12²
a = √81
a = 9
80
89^2-39^2=6400, 6400=80^2
It's 15°
BC+60°+85°+200° =360°
BC+345°=360°
BC=360°-345°
Bc=15°
B
Hope this helps!!
the answer is 2100
so sorry I don't know