Ruby's water bottle holds 1 9/10 liters of water. Noland's water bottle holds 2 3/5 liters of water. Noland says that his bottle holds about 1/2 liter more water than Ruby's. Round to the nearest fourth, 1 9/10 is closest to and 2 3/5 is closest to . The difference between the bench mark is , so Nolan's estimate is .

If this were an angle it would surely be side DE & ED because both sides of that certain angle contains both point D and point E. It would serve as the common sides of that angle. This one is not adjacent to each other but both share common sides and also not common vertex.