The answer is the third one -2.
Sorry if my writing is sloppy
This most definitely has to be a rhombus since it is a form of a square with 4 congruent sides where a rectangle only has 4 right angles.
To clarify, a trapezoid only has one pair of parallel sides if you were wondering.
Answer:
x = 12
Step-by-step explanation:
To solve this and show your work, you have to start of with the equation (3x - 6) = 30.
You then have to add 6 to both sides like this:

So then the 6 is cancelled out, and you are left with
3x = 36.
Now you just have to divide both sides by 3 like this:

Which cancels 3 out, and you are left with
x = 12.