Which of the following does not define a unique triangle?

The appalachian trail is a hiking trail that passes through the appalachian mountains. three members of a teen hiking group hiked a section of the trail. the hikers stopped at a rest area and equally shared 3 4 gallon of water. how much water did each person get?

How to use order of operation in 20 divide by 4 multiply 5 = 1

A50% increase followed by 33 1/2% decrease