## Geometry 4-1 & 4-2

October 28, 20094-1 (Classifying Triangles)

Presentation: 8-tab foldable

Angle Measure | Side Length |
---|---|

Acute Triangle | Equlateral Triangle |

Equiangular Triangle | Isosceles Triangle |

Right Triangle | Scalene Triangle |

Obtuse Triangle | Triangle Sum Theorem |

4-2 (Angle Relationships)

Presentation: Envelope fold (4-tab) foldable

Exterior Angle Theorem | The measure of an exterior angle of a triangle is equal to the sum of the measures of its two remote interior angles. (w/ diagram) |

Corollary 4-2-2 | The acute angles of a right angle are complementary. (w/ diagram) |

Corollary 4-2-3 | The measure of each angle of an equiangular triangle is 60°. (w/ diagram) |

Third Angles Theorem | If two angles of one triangle are congruent to two angles of another triangle, then the third pair of angles is congruent. (w/ diagram) |

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