Answer:
1. use the formula
2. use the formula
3. There is only one at 360 degrees
4. there are 6 rotational symmetries and the number of reflectional symmetries would be 6 as you can see:
The slope is 1.
Step-by-step explanation: This answer is correct, because the rise is 2 and the run is 2 which means 2/2 and that equals 1.