Final answer:
The perimeter of a parallelogram is multiplied by 6 when the base and height are multiplied by 6.
Step-by-step explanation:
The effect on the perimeter of a parallelogram when the base and height are multiplied by 6 is that the perimeter will also be multiplied by 6.
The perimeter of a parallelogram is calculated by adding the lengths of all four sides. When the dimensions are multiplied by 6, each side length will be multiplied by 6 as well, resulting in a perimeter that is 6 times larger than the original.
For example, if the original base and height of the parallelogram were 2 units each, the new base and height would be 12 units each. The perimeter would then be calculated as (12 + 12 + 12 + 12) = 48 units, which is 6 times the original perimeter.