### Theory:

**In this lesson we learn the summary of the quadrilaterals properties**.

Quadrilaterals | Opposite sides | All sides are equal | Opposite angles are equal | Diagonals | ||

Parallel | Equal | Equal | Perpendicular | |||

| Yes | Yes | Yes | Yes | Yes | Yes |

| Yes | Yes | No | No | No | No |

Rectangle | Yes | Yes | No | Yes | Yes | No |

Rhombus | Yes | Yes | Yes | Yes | No | Yes |

Trapezium | No | No | No | No | No | No |

Now we got an immense understanding in the concept of polygons and quadrilaterals, now observe the below flow chart which explains about polygons.