Math help?

Hi! Some help with these trig problems would be greatly appreciated

A firefighter in a helicopter is flying towards two fires. She observes that the angles of depression to the two fires are 30degrees and 50degrees. At that moment, her helicopter is at an altitude of 800 m. Determine the distance between the two fires.

Question 2:

For deltaABC, if angleA=20degrees and C = 50, determine how many triangles can be drawn if a = 55.

Thank you!

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