I believe the answer you are looking for would be land form, or land formation.
they Will take on the shape of the inside of their container
They both shape the land by sweeping away parts of the land by water or wind
Topography refers to the shape or height of the land. It includes features such as mountains, valleys, and plateaus.
erosion
What is formed in the shape of a long, low land area between hills or mountains
Landform
There is no name for the shape of the land in costa rica.
How did ancient indias land shape its civalization
You take a look at what 2-D shape the face is, and then that's the name of the face.
they Will take on the shape of the inside of their container
They both shape the land by sweeping away parts of the land by water or wind
Relief is a term that is used to describe land's physical shape. It describes the height, slope, shape, and aspect of land.
A Peninsula
I think it is a triangle shape as most big land yachts are.
runway
topography
India has a triangle like shape.