Hello!
A rhombus has several properties such as:
Opposite angles are isometric (in my little drawing, isometric angles are the same colors. So the angles in pink are equal and the angles in blue are equal)
The diagonals intersect in their middle and are perpendicular to each other.
The 4 sides of a rhombus are isometric.
Opposite sides are parallel.
If you add a blue angle with a pink, so the consecutive angles, you will get 180 degrees.
Let us know if we can help you with anything else!
-Marilee