Rotation Notes

When you rotate 180 degrees the ( x , y ) becomes ? (use your notes!)

• ( y , x )

• ( -y , x )

• ( -x , y )

• ( -x , -y )

When you rotate 270 degrees counterclockwise the algebraic representation is ( x , y ) ---> ? (use your notes!)

• ( -x , -y )

• ( -y , x )

• ( y , -x )

• ( x , y )

What is this picture an example of? 

• An angle

• A cat vertex 

• Rotation 

• Dilation

What is the algebraic representation for a 90° counterclockwise rotation? (use your notes!)

• (x, y) ----> ( -x, -y)

• (x, y) ----> ( y, -x)

• (x, y) ----> ( x, y)

• (x, y) ----> ( -y, x)

What is the rule for a 180 degree clockwise rotation?

What is the rule for a 180 degree counterclockwise rotation?

What is the rule for a 270 degree counterclockwise rotation?

A 90 degree clockwise rotation is the same as what?

• 90 degree counterclockwise

• 180 degree counterclocwise

• 270 degree counterclockwise

A 270 degree clockwise rotation is the same as what?

• 90 degree counterclockwise

• 180 degree counterclocwise

• 270 degree counterclockwise

Rotate the point (-4,5) 90 degrees clockwise.