Suppose that we want to install a zipline between two cliffs overlooking a forest. The desired locations for the zipline endpoints are (320,805,563) and (760, 670, 602). There is a large tree growing between the zipline endpoints. The base of the tree is located at (672,697,247) and is 332 units tall. Assume that the zipline requires 10 ft of clearance beneath it at every point along it for safety, and the zipline always remains taut (straight, not bent or curved). Will the tree obstruct the required clearance space for the zipline? Why or why not? No, the tree is not in the way. The tree is not located directly beneath the zipline, so it doesn't matter how tall it is. It is safe to install the zipline. No, the tree is not in the way. Although the treetop is directly beneath the zipline, it is more than 10 ft beneath the zipline, so it's safe to install the zipline. Yes, the tree is in the way. The tree is growing directly beneath the zipline, and is too tall for the zipline to have the required 10 ft of clearance. The zipline will have to be installed elsewhere