Answer:

Step-by-step explanation:
see the attached figure to better understand the problem
we know that
The area of triangle ABC applying the law of sines is equal to

substitute the given values


Hi,
From the picture you can see how 5x and 4x add up to 90°.
4x + 5x = 90°
9x = 90°
x = 10°
Hope this helps! If my answer was not clear enough or you’d like further explanation please let me know. Also, English is not my first language, so I’m sorry for any mistake.
Answer:1197.421
Step-by-step explanation: