Rotation Coordinate Notation About the Origin:
90–degree counterclockwise: (x, y) → (-y, x)
180–degree counterclockwise: (x, y) → (-x, -y)
270–degree counterclockwise: (x, y) → (y, -x)
Use this to help you..
Example -
The vertices of a triangle are
( 1 , 3 ) ( 3 , -4 ) , ( - 6 , -8 )
270 degrees , clockwise , rotated from origin ( x , y ) - ( y , -x )
The first vertice = ( 1 , 3 )
after rotation - ( 3 , - 1 )
The second vertice = ( 3 , -4 )
After rotation - ( -4 , -3 )
The third vertice = ( -6 , - 8 )
After rotation - ( -8 , 6 )
Hope my answer helps!
