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10 cards from this deck
Total distance around the outside edge of a shape
Add up the lengths of all sides
Linear units (cm, m)
They are equal
Amount of space inside a shape
Square units (cm2cm^2cm2, m2m^2m2)
Count the squares inside the shape
1cm21 cm^21cm2
rac{1}{2} cm^2
Area uses square units, perimeter uses linear units
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