What are some African countries?

What is the area of a square?
The area of a square is length of it’s side square
Tell me about AZTECS
The Aztecs used pyramids in rituals of human sacrifice.Thier civilization began to fall when Hernan Cortes of Spain defeated Montezuma II in 1519.
Wat are some parts of a volcano?
magma
vents
lava
crater
gases
3 helping verbs starting with may
may must might