Use a protractor and a straight edge to construct a 75 degree angle
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A 75 degree angle.
what is the value of sin 75 degree
15 degrees
Draw a straight horizontal line, and a vertical line in the middle of it. Now line these up the the lower edge of your protractor, with the vertical line in the middle of your protractor (at the 90 degree marking). Now, find the 75 degree marking on the protractor, and mark on the piece of paper where it falls. Draw a line from centre of your horizontal line, to the mark of where 75 degree is. You're done!
If you mean the height of the building then it works out as 466.5063509 feet