# Parallelogram angles

The sum of the two angles of the parallelogram adjacent to one side is 180 °. The opposite angles of the parallelogram are equal. Using the formula below, you can find all four corners of the parallelogram.

**Find the angles of the parallelogram through the length of the sides and the diagonal**

**Side of the parallelogram a**

**Side of the parallelogram b**

**The diagonal of the parallelogram d**

**Angle α (degree)**

**Angle β (degree)**