A 180 Degree shape would be a line a straight line or diagnal like this: _____________
triangle
change the sign, but DONT switch the coordinates (:
half a circle
Not always. It depends where the line of symmetry is located.
Moviemaking Techniques - 180 Degree Rule
How To Play Soccer: 180 Degree Turn
How To Do a Frontside 180 Ollie
How to do a 180-Degree Return in Tennis