i am pretty sure the answer is 8.
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Answer:
7
Step-by-step explanation:
You just know when u got it
Answer:

Step-by-step explanation:
All vertices meet at right angles, so sealing off these two rectangles will give you this:
![\displaystyle [2][4] + [4][8] = 8 + 32 = 40; 40mm.^2 \\ 4 + 6 + 2 + 4 + 8 + 8 = 32; 32mm.](https://tex.z-dn.net/?f=%5Cdisplaystyle%20%5B2%5D%5B4%5D%20%2B%20%5B4%5D%5B8%5D%20%3D%208%20%2B%2032%20%3D%2040%3B%2040mm.%5E2%20%5C%5C%204%20%2B%206%20%2B%202%20%2B%204%20%2B%208%20%2B%208%20%3D%2032%3B%2032mm.)
* The missing sides are 4 and 6.
I am joyous to assist you anytime.
It would be D because you add the the 3 and the 5 and you get 8