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 | 58 (46%) | 2008-12-27 |

Complementary Angles 2 | easy | 64 (50%) | 2008-12-27 |

Supplementary Angles 1 | easy | 58 (46%) | 2008-12-27 |

Supplementary Angles 2 | medium | 59 (46%) | 2008-12-27 |

Straight Angle 1 | easy | 52 (41%) | 2008-12-24 |

Vertical Angles 1 | medium | 54 (43%) | 2008-12-27 |

Parallel Lines 1 | easy | 56 (44%) | 2008-12-27 |

Parallel Lines 2 | easy | 54 (43%) | 2008-12-27 |

Parallel Lines 3 | easy | 53 (42%) | 2008-12-27 |

Parallel Lines 4 | hard | 47 (37%) | 2008-12-28 |

Converse of Parallel Lines 1 | easy | 48 (38%) | 2008-12-28 |

Converse of Parallel Lines 2 | medium | 34 (27%) | 2008-12-28 |

Converse of Parallel Lines 3 | medium | 36 (28%) | 2008-12-28 |

Converse of Parallel Lines 4 | hard | 26 (20%) | 2008-12-28 |

Converse of Parallel Lines 5 | medium | 32 (25%) | 2008-12-28 |

Parallelogram 1 | easy | 43 (34%) | 2008-12-29 |

Parallelogram 2 | easy | 44 (35%) | 2008-12-29 |

Parallelogram 3 | medium | 44 (35%) | 2008-12-29 |

Parallelogram 4 | easy | 38 (30%) | 2008-12-29 |

Parallelogram 5 | hard | 42 (33%) | 2008-12-29 |

Parallelogram 6 | easy | 39 (31%) | 2008-12-29 |

Parallelogram 7 | medium | 38 (30%) | 2008-12-29 |

Parallelogram 8 | hard | 35 (28%) | 2008-12-29 |

Parallels and Perpendiculars 1 | medium | 37 (29%) | 2009-01-14 |

Parallels and Perpendiculars 2 | medium | 36 (28%) | 2009-01-18 |

Parallels and Perpendiculars 3 | medium | 35 (28%) | 2009-01-18 |

Triangle Sum Theorem 1 | easy | 34 (27%) | 2009-01-14 |

Triangle Sum Theorem 2 | medium | 31 (24%) | 2009-01-18 |

Triangle Sum Theorem 3 | hard | 29 (23%) | 2009-01-18 |

Triangle Exterior Angle Theorem 1 | easy | 32 (25%) | 2009-01-18 |

Quadrilateral Sum Theorem 1 | easy | 36 (28%) | 2009-01-18 |

Similar Triangles 1 | easy | 43 (34%) | 2009-02-08 |

Similar Triangles 2 | easy | 39 (31%) | 2009-02-08 |

Similar Triangles 3 | medium | 38 (30%) | 2009-02-08 |

Similar Triangles 4 | hard | 36 (28%) | 2009-02-08 |

Congruent Triangles 1 | easy | 44 (35%) | 2009-02-08 |

Congruent Triangles 2 | medium | 38 (30%) | 2009-02-08 |

Congruent Triangles 3 | hard | 37 (29%) | 2009-02-08 |

Congruent Triangles 4 | hard | 31 (24%) | 2009-02-08 |

Copyright ©2010. All rights reserved.