Select a proof from the list below to get started. To see and record your progress, log in here.

Title | Difficulty | Solved By | Date Added |
---|---|---|---|

Complementary Angles 1 | easy | 464 (69%) | 2008-12-27 |

Complementary Angles 2 | easy | 459 (68%) | 2008-12-27 |

Supplementary Angles 1 | easy | 457 (68%) | 2008-12-27 |

Supplementary Angles 2 | medium | 404 (60%) | 2008-12-27 |

Straight Angle 1 | easy | 446 (66%) | 2008-12-24 |

Vertical Angles 1 | medium | 408 (60%) | 2008-12-27 |

Parallel Lines 1 | easy | 452 (67%) | 2008-12-27 |

Parallel Lines 2 | easy | 436 (64%) | 2008-12-27 |

Parallel Lines 3 | easy | 443 (66%) | 2008-12-27 |

Parallel Lines 4 | hard | 340 (50%) | 2008-12-28 |

Converse of Parallel Lines 1 | easy | 415 (61%) | 2008-12-28 |

Converse of Parallel Lines 2 | medium | 359 (53%) | 2008-12-28 |

Converse of Parallel Lines 3 | medium | 301 (45%) | 2008-12-28 |

Converse of Parallel Lines 4 | hard | 182 (27%) | 2008-12-28 |

Converse of Parallel Lines 5 | medium | 265 (39%) | 2008-12-28 |

Parallelogram 1 | easy | 265 (39%) | 2008-12-29 |

Parallelogram 2 | easy | 261 (39%) | 2008-12-29 |

Parallelogram 3 | medium | 227 (34%) | 2008-12-29 |

Parallelogram 4 | easy | 211 (31%) | 2008-12-29 |

Parallelogram 5 | hard | 144 (21%) | 2008-12-29 |

Parallelogram 6 | easy | 175 (26%) | 2008-12-29 |

Parallelogram 7 | medium | 147 (22%) | 2008-12-29 |

Parallelogram 8 | hard | 101 (15%) | 2008-12-29 |

Parallels and Perpendiculars 1 | medium | 189 (28%) | 2009-01-14 |

Parallels and Perpendiculars 2 | medium | 142 (21%) | 2009-01-18 |

Parallels and Perpendiculars 3 | medium | 145 (21%) | 2009-01-18 |

Triangle Sum Theorem 1 | easy | 235 (35%) | 2009-01-14 |

Triangle Sum Theorem 2 | medium | 194 (29%) | 2009-01-18 |

Triangle Sum Theorem 3 | hard | 114 (17%) | 2009-01-18 |

Triangle Exterior Angle Theorem 1 | easy | 149 (22%) | 2009-01-18 |

Quadrilateral Sum Theorem 1 | easy | 119 (18%) | 2009-01-18 |

Similar Triangles 1 | easy | 189 (28%) | 2009-02-08 |

Similar Triangles 2 | easy | 156 (23%) | 2009-02-08 |

Similar Triangles 3 | medium | 83 (12%) | 2009-02-08 |

Similar Triangles 4 | hard | 64 (09%) | 2009-02-08 |

Congruent Triangles 1 | easy | 208 (31%) | 2009-02-08 |

Congruent Triangles 2 | medium | 175 (26%) | 2009-02-08 |

Congruent Triangles 3 | hard | 143 (21%) | 2009-02-08 |

Congruent Triangles 4 | hard | 67 (10%) | 2009-02-08 |

Copyright ©2010. All rights reserved.