Basically add up all the sides... And that's the perimeter don't forget to add your units
Weathering:
<u>Definition</u><u>:</u> The process of wearing or being worn by long exposure to the atmosphere.
<u>Example</u><u>:</u> Plateaus can be formed by weathering
Erosion:
<u>Definition</u><u>:</u> the gradual destruction or diminution of something.
<u>Example</u><u>:</u> Landforms of coastal erosion include cliffs, wave-cut platforms, caves and arches.
Deposition:
<u>Definition</u><u>:</u> Deposition is the geological process in which sediments, soil and rocks are added to a landform or landmass.
<u>Example</u><u>:</u> Beaches, deltas, glacial moraine, sand dunes, and salt domes.
Which countries are an option?