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12 cards from this deck
Same shape, different sizes; can be rotated/reflected
They maintain their proportions
All corresponding angles must be equal
All corresponding sides must be proportional (same ratio)
Equal angles AND proportional sides (both required)
All three angles in both triangles are equal
All three sides are in the same ratio
Two sides proportional with same included angle between them
How much bigger or smaller one shape is than another
new lengthoriginal length\frac{\text{new length}}{\text{original length}}original lengthnew length
Multiply corresponding known side by scale factor
Divide by the scale factor
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