Answer:
The answer is (D) 44 units
Explanation:
1. The formula for the area of a rhombus is A= 

2. Fill in the information we know:
3. Now work backward:
- If A= 
  then that means 264 = then that means 264 =
   
- So 12 multiplied by a number divided by 2 is equal to 264
- That means that 264 multiplied by two and divided by 12 will give you the mystery number.
4. Solve it:
- 264 multiplied by 2 is equal to 528
-  528 divided by 12 is equal to 44
Hence 44 units (D) is your answer