Imagine that we're using a point on the shore as our reference point. First the rowboat ends up 23 feet out from this reference point. Next, the boat drifts another 9 feet out in exactly the same direction as before.
The following equation represents R'ena's rowboat position:
From the figure, we can conclude that the little triangle is an isosceles triangle, the greatest angle is 90 because ∠A = 90 and they are supplementary, therefore, using the triangle sum theorem:
