## G-CO.11

Grade / Level | High School - Geometry |
---|---|

Domain | Congruence |

Cluster | Prove geometric theorems |

Standard | Prove theorems about parallelograms. Theorems include: opposite sides are congruent, opposite angles are congruent, the diagonals of a parallelogram bisect each other, and conversely, rectangles are parallelograms with congruent diagonals. |

### Learning Objects

- G.CO.11 part 1 Prove that the opposite sides of a parallelogram are congruent. (pcincotta)
- G.CO.11 part 2 Prove that the opposite angles of a parallelogram are congruent. (pcincotta)
- G.CO.11 part 3 Diagonals of a parallelogram bisect each other. (pcincotta)
- G.CO.11 part 4 Prove that rectangles are parallelograms with congruent diagonals. (pcincotta)