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 | 83 (45%) | 2008-12-27 |

Complementary Angles 2 | easy | 81 (44%) | 2008-12-27 |

Supplementary Angles 1 | easy | 75 (40%) | 2008-12-27 |

Supplementary Angles 2 | medium | 58 (31%) | 2008-12-27 |

Straight Angle 1 | easy | 64 (34%) | 2008-12-24 |

Vertical Angles 1 | medium | 42 (23%) | 2008-12-27 |

Parallel Lines 1 | easy | 61 (33%) | 2008-12-27 |

Parallel Lines 2 | easy | 59 (32%) | 2008-12-27 |

Parallel Lines 3 | easy | 53 (28%) | 2008-12-27 |

Parallel Lines 4 | hard | 29 (16%) | 2008-12-28 |

Converse of Parallel Lines 1 | easy | 51 (27%) | 2008-12-28 |

Converse of Parallel Lines 2 | medium | 42 (23%) | 2008-12-28 |

Converse of Parallel Lines 3 | medium | 44 (24%) | 2008-12-28 |

Converse of Parallel Lines 4 | hard | 24 (13%) | 2008-12-28 |

Converse of Parallel Lines 5 | medium | 40 (22%) | 2008-12-28 |

Parallelogram 1 | easy | 23 (12%) | 2008-12-29 |

Parallelogram 2 | easy | 19 (10%) | 2008-12-29 |

Parallelogram 3 | medium | 12 (06%) | 2008-12-29 |

Parallelogram 4 | easy | 16 (09%) | 2008-12-29 |

Parallelogram 5 | hard | 8 (04%) | 2008-12-29 |

Parallelogram 6 | easy | 13 (07%) | 2008-12-29 |

Parallelogram 7 | medium | 7 (04%) | 2008-12-29 |

Parallelogram 8 | hard | 6 (03%) | 2008-12-29 |

Parallels and Perpendiculars 1 | medium | 14 (08%) | 2009-01-14 |

Parallels and Perpendiculars 2 | medium | 13 (07%) | 2009-01-18 |

Parallels and Perpendiculars 3 | medium | 14 (08%) | 2009-01-18 |

Triangle Sum Theorem 1 | easy | 47 (25%) | 2009-01-14 |

Triangle Sum Theorem 2 | medium | 34 (18%) | 2009-01-18 |

Triangle Sum Theorem 3 | hard | 22 (12%) | 2009-01-18 |

Triangle Exterior Angle Theorem 1 | easy | 28 (15%) | 2009-01-18 |

Quadrilateral Sum Theorem 1 | easy | 11 (06%) | 2009-01-18 |

Similar Triangles 1 | easy | 16 (09%) | 2009-02-08 |

Similar Triangles 2 | easy | 8 (04%) | 2009-02-08 |

Similar Triangles 3 | medium | 4 (02%) | 2009-02-08 |

Similar Triangles 4 | hard | 3 (02%) | 2009-02-08 |

Congruent Triangles 1 | easy | 31 (17%) | 2009-02-08 |

Congruent Triangles 2 | medium | 19 (10%) | 2009-02-08 |

Congruent Triangles 3 | hard | 5 (03%) | 2009-02-08 |

Congruent Triangles 4 | hard | 5 (03%) | 2009-02-08 |

Copyright ©2010. All rights reserved.