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10 cards from this deck
Total distance around the outside edge of a shape
2imesextlength+2imesextwidth2 imes ext{length} + 2 imes ext{width}2imesextlength+2imesextwidth
4imesextsidelength4 imes ext{side length}4imesextsidelength
Add all three side lengths together
π×diameter\pi \times \text{diameter}π×diameter
The perimeter of a circle
3.142
Multiply diagram measurement by scale factor
mm, cm, m, or km (units of length)
Rectangle has two pairs of equal sides
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