Answer:
22
Explanation:
Left side length.
The left side is the hypotenuse of a triangle with legs measuring 3 and 4.
a² + b² = c²
3² + 4² = c²
c = 5
Top side: 5
Right side: 4
Bottom side: 8
Left side: 5
perimeter = sum of lengths of sides
perimeter = 5 + 4 + 8 + 5
perimeter = 22