Simple geometry can compute the height of an object from the object's shadow length and shadow angle using the formula: tan(angleelevation) = treeheight / shadowlength. 1. using simple algebra, rearrange that equation to solve for treeheight. (note: don't forget tangent). 2. complete the below code to compute treeheight. for tangent, use the tan() function, described in the "math functions" link above.