Zero.
none all it has is right angles
a rhombus has 4 equal sides
6
Exactly two.
There are 4 interior angles in a rhombus that add up to 360 degrees.
it has 4 vertices
2 pairs
2 pairs
A rhombus normally has no right angles (at the vertices). If a rhombus has right angles (at the vertices), it is called a square. The diagonals of a rhombus meet at right angles.
First you see how many sides and angels it has
It has 4 equal sides and the angel is 90.
A rhombus doesn't need any right angles to be a rhombus, although it can have them if it wants to. If a rhombus has right angles, then it's a square. And if it has one right angle, then it must have four of them.