If rstu is a rhombus, then

a. it might be a square

b. it must be a square

c. it cannot be a square

a the side lengths must be = but only opposite angles must be = it COULD be a square but is could be many other things.

The correct answer is a. it might be a square.

Step-by-step explanation:

This is because a rhombus has 4 equal sides. However, the stipulations on a rhombus have nothing to do with angles.

So there is a chance that the angles are all right angles, which would be a square. However, there is a chance that they are not, which would mean that it isn't.

a - base

b - exponent

so,