Answer:
12
Step-by-step explanation:
12×12=144
12 squared equals 144 so square root is 12.
14
the four smaller rectangles of each of the corners: 2*1=2. since there are four of them, 2*4=8
the middle, larger rectangle: (6-2-2)*(1+1+1) = 2*3 =6
add small and big rectangles: 8+6 = 14
hope it helps make brainliest
