Introduction
A rotation is where one moves something around a center or axis. On a graph, a lot of the time (0,0) is what something is rotated around.
Task
You will be rotating a triangle around the origin. You will be rotating it 90 degrees cc, 180 degrees cc, and 270 degrees cc.
The triangle's coordinates are:
A: (5,-2)
B: (3,7)
C: (-5,9)
Process
For a 90 degree rotation cc, (x,y) changes to (-y,x)
180 degrees rotation cc, (x,y) goes to (-x,-y)
270 degrees cc, (x,y) changes to (y,-x)
Evaluation
If you are doing it right then when you fully rotate the triangle, it should fit back onto itself again.
Conclusion
A: (5,-2)
B: (3,7)
C: (-5,9)
90 degrees:
A': (2,5)
B': (-7,3)
C': (-9,5)
180 degrees:
A': (-5,2)
B': (-3,-7)
C': (5,-9)
270 degrees:
A': (-2,-5)
B': (7,-3)
C': (9,5)
Credits
Green Paper
Mrs. Roitz
ME