What is the perimeter of parallelogram LMNO? |
D. 80 cm |

In parallelogram LMNO, what are the values of x and y? |
C. x = 55, y = 14 |

In parallelogram LONM, what is OM? |
D. 34 cm |

What is the measure of angle L in parallelogram LMNO? |
m<L=40 |

The perimeter of parallelogram WXYZ is 50 millimeters. What is WZ? |
A. 2 mm |

The perimeter of parallelogram PQSR is 74 cm. What is QS? |
2. 6 cm |

Given: AB ≅ CD and AD ≅ BC A. triangle angle sum theorem |
C. SSS congruency theorem |

Given: AD ≅ BC and AD ∥ BC A. SSS congruency theorem |
B. CPCTC |

What is the measure of angle O in parallelogram LMNO? |
m<O = 105 degrees |

Which best explains if quadrilateral WXYZ can be a parallelogram? A. WXYZ is a parallelogram because diagonal XZ is bisected. |
D. WXYZ is not necessarily a parallelogram because it is unknown if WC = CY. |

# Proving a Quadrilateral Is a Parallelogram

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