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# Being at the bottom of the ocean
# ocean floor neighborhoods
# What is the shape of the ocean floor?
# Swimming in a bottle on the ocean floor
# Steps on the ocean floor
# Topography of the ocean floor
# Topography of the bottoms of seas and oceans
# Characteristics of the sea floor and ocean
# sea floor and ocean
# The morphology of the bottom of the oceans and seas
# perimeter trench
# Calculate the perimeter and area of a polygon
# Perimeter of a rectangle
# Overview of the perimeter of a rectangle
# Examples of calculating the perimeter of a rectangle
# Calculate the perimeter of a square
# The formula for the perimeter and area of a square
# What is the perimeter of a parallelogram?
# Overview of the perimeter of a parallelogram
# Quadrant perimeter formula
