When the angle of elevation of the sun was 55 degrees, the length of the flagpole was 210ft. find the height of the flagpole to the nearest foot.

We have a right triangle; 
Data:
Ф=55º
adjacent=210 ft
opposite=height of the flagpole=h

tan Ф=opposite/ adjacent
tan 55º=h/(210 ft)
h=(210 ft)*tan 55º
h≈300 ft

the height of the flagpole would be 300 ft. 

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