Lisa is repairing fences on a piece of ranch land. she needs to arrive at point a from point b in the diagram. but the land there is low and sometimes floods. before she decides to risk it, she wants to know how much distance she’ll save if she goes straight from b to a instead of taking the dry path from b to c to a. angle bca is a right angle. ac = bc + 21 feet, and ab = bc + 24 feet. a triangle diagram representing lisa's path if lisa travels straight from b to a, she’ll walk feet, which will save her feet compared with traveling the longer, drier path.