No, there are several more plates than continents (twelve I think) and the plates include both oceans and land. Earthquakes are the result of plates moving, but don't worry, plates do not move fast,...
This is geometry that is based on ordinary space-- space as we normally consider it. This is the ordinary space of 3 dimensions as you can imagine them in the coordinate system. Planes are flat, and...
There are lot of shapes in geometry. It is called polygons. Triangle, trapezoid, circle, parallelogram, rhombus, rectangle, diagonal, square etc. Parallelogram, rhombus, rectangle, diagonal, square,...