Answer:
26
Step-by-step explanation:
4 + 2 + 3 + 4 + 7 + 6
9+4+7+6
13+7+6
20+6
26 units
The top is 6
The right side is 4+3=7
The bottom is 2+4 = 6
The left is 7
6+7+6+7 =26