Answer:
the correct answer is the third one. (1, 16), (2, 20), (3, 24)
Explanation:
A perimeter is a path that surrounds a two-dimensional shape.
In the first case, 1 rectangle, the perimeter is the sum of all the sides:
Perimeter = 6 + 2 + 6 + 2 = 16
In the second case, 2 rectangles, the perimeter is the sum of all external sides:
Perimeter = 6 + 2 + 2 + 6 + 2 + 2 = 20
In the third case, three rectangles, the perimeter is the sum of all external sides:
Perimeter = 6 + 2 + 2 + 2 + 6 + 2 + 2 + 2 = 24
In none of the cases, you take into consideration the interal sides. Just the external sides, so the correct answer is the third one.