Answer: Rhombus, trapezoid, rectangle
Step-by-step explanation: A diamond can have all sides the same length. A rhombus has all sides with the same length. The diamond also has at least one pair of parallel sides, like a trapezoid. It can have right angles, so it might be a rectangle. A circle is round so it can't be a diamond.
So the answer is.....
- rhombus
- trapezoid
- rectangle