Answer:

Step-by-step explanation:
Let 's' be the side of the original square
the length of the side of a square is doubled, so the length of the new square is 2s
Area of the original square with side length 's' is 
Area of the new square with side length '2s' is 
Area of the new square is 4 times the area of the original square
ratio of the areas of the original square to the area of the new square

360/18= 20
so the answer is 20 degrees
It depends on the how much the ratio makes but i think it is 72 but not positive but it also might be 6 but that is with additional information
Answer:
1. 24.36
2. Do the same thing (follow the steps in the picture)
Step-by-step explanation: