A-frame is shaped like an "A".
Size: A-frame's have headroom, but having a slanted ceiling means you must sleep in the center of the tent.
Room: It can fit 1 or 2 people pending on the size of the tent.
Reliability: A-frame tent is very sturdy in bad weather. It is good against rain because of the two slanted roof but against strong winds it might collapse.
Benefits:Good for one person
Great for storage
Easy set up
Disadvantages:Bad against strong winds
Not having a lot of room on the sides