document.write( "Question 98263: A girl stands 400 ft. from a tree. With her eye at ground level she sights along a yard stick and finds the top of the yard stick coincides with the top of the tree when the bottom of the yard stick is 4 feet from her eye. Find the height of the tree. \n" ); document.write( "
Algebra.Com's Answer #71437 by checkley71(8403)\"\" \"About 
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3/4=x/400
\n" ); document.write( "4x=1200
\n" ); document.write( "x=1200/4
\n" ); document.write( "x=300 feet to the top of the tree.
\n" ); document.write( "proof
\n" ); document.write( "draw a triangle with the base=400, the distance from the eye to the bottom of the yard stick=4 feet & the height of the yard stick=3 feet.
\n" ); document.write( "now you have a 3 by 4 right triangle and an x by 400 triangle.
\n" ); document.write( "these are similiar triangles whose sides are proportional:
\n" ); document.write( "3:4, 300:400
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