nails4life324
05.05.2021 •
Mathematics
3. An airplane flying at an altitude of 25,000 feet is observed at an angle of elevation of 60°. How far is the airplane from the observer? Hint: Draw a diagram and label what you know.
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Ответ:
x=12.
Step-by-step explanation:
Let's get this straight out of the way, the 3 angles of a triangle ALWAYS add up to 180. Now that that's said, lets begin. Since the opposing side of an angle is the same as the regular side, we simplify to get: 5x+120=180. 180-120=60. so 5x=60. 60/5=12. so x=12.