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April 23, 2014

Homework Help: Math-trig

Posted by Anonymous on Wednesday, December 19, 2012 at 4:33pm.

A stairway runs up the edge of the
pyramid. From bottom to top the stairway
is 92 m long. The stairway makes an angle of 70 to the base edge, as shown. A line from the middle of one of the base edges to the top of the pyramid makes an angle of elevation of 52 with respect to the flat ground. Find the height of the pyramid.

I just can't figure out where 70 degrees comes into play, help is appreciated :)

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