Answer:
21mm
Step-by-step explanation:
The formula for solving the area of a rhombus is : [tex]\frac{1}{2}xy[/tex], where x and y are two intersecting diagonals.
In this case, we are given both values, thankfully. 6 and 7 are to be replaced with x & y. Now, the rest you have to do is simple math.
[tex](6 * 7) / 2 = 21[/tex]
The area of the rhombus is 21mm.
