# Parallelogram law

## Description

Parallelogram is a simple quadrilateral with two pairs of parallel sides. The opposite or facing sides of a parallelogram are of equal length and the opposite angles of a parallelogram are of equal measure.Diagonals of a parallelogram bisect each other.

Parallelogram law states that the sum of the squares of the lengths of the four sides of a parallelogram equals the sum of the squares of the lengths of the two diagonals

## Variables

a | Side of the parallelogram (m) |

b | Side of the parallelogram (adjacent to a) (m) |

c | Side of the parallelogram (opposite and equal to a) (m) |

d | Side of the parallelogram (opposite and equal to b) (m) |

AC | Diagonal of the parallelogram (m) |

BD | Diagonal of the parallelogram (m) |