A | B |

Magnitude | how "big" a transformation is (k-value). |

Expansion | k>1 |

Contraction | 0<k<1 |

Dilation | A transformation that looks like (x,y) = (kx, ky) |

Proportion | Two equal ratios. |

Ratio | A quotient of two numbers (m/n). |

Similarity Transformation | A combination of size changes and reflections. |

Similar | Having proportional sides and congruent angles. |

SSS Similarity Theorem | If 3 sides of one triangle are proportional to 3 sides of another, then the triangles are similar. |

AA Similarity Theorem | If 2 triangles have 2 or more angles congruent, then the triangles are similar. |

SAS Similarity Theorem | If two triangles have 2 sets of sides that are proportional and congruent included angles, then the triangles are similar. |