answer: the angel abc is 30°,and the abc is a triangle where the angel bac is 90°
so ac is the half of 24=12ft,and from the pythagorean theorem we find ba
ba=√bc^2-ac^2=√576-144=√432=12√3ft
so bac is 12+12√3=12(1+√3)ft
Answer from: Quest
you estimate that the angle of elevation to the top of the 86th floor (the observatory) is 82 .the total height of the building is another 123 meters above the 86th floor.
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Mathematics, 21.06.2019 14:00
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