3. A surveyor measures the distance across a straight river by the following method (see figure below). Starting directly across from a tree on the opposite bank, she walks d = 100 m along the riverbank to establish a baseline. Then she sights across to the tree. The angle from her baseline to the tree is 0 = 35.09. How wide is the river? d X Problem No. 3 Problem No. 4.ctiva Vindow