Can anyone help me please :)

What rotation was applied to triangle def to create d’e’f’?

Why is x= 4 a solution to the proportion 14/x 56/1 6

Solve this problem by using a 5d process or writing and solving an equation. no matter which method you use, be sure to define your variable and write an equation to represent the relationship a rectangle has a perimeter of 30 inches. its length is one less than three times its width what are the length and wodyh of the rectangle?