Geom: G.CO.A.5 Guide 2/5

Rotation Basics

G.CO.A.5 Guide 2/5

Fill in the Blank

In the rotation  $R_{A,27\degree}\ L\left(4,-5\right)$ , what is the angle of rotation in degrees?  

Multiple Choice

In the rotation  $R_{A,27\degree}\ L\left(4,-5\right)$  what is the center of rotation? 

• Point R

• Point A

• Point L

Multiple Choice

True/False: After a rotation, the image will have a different orientation than the preimage.

• True

• False

Remember

Orientation deals with whether the points are clockwise or counterclockwise from one to the next. Only reflections change the orientation.

Multiple Choice

True/False: Patty paper can be a useful tool in performing rotations.

• True

• False

Multiple Choice

What will the image of  $A\left(-2,-4\right)$  be after a  $90\degree$  counterclockwise rotation? 

•  $A'\left(-4,-2\right)$  

•  $A'\left(4,-2\right)$  

•  $A'\left(-4,2\right)$  

Multiple Choice

What is the rule for  $R_{O,90\degree}\ \left(x,y\right)\rightarrow$  

•  $\left(-y,x\right)$  

•  $\left(x,-y\right)$  

•  $\left(y,-x\right)$  

•  $\left(-x,-y\right)$  

Multiple Choice

 $\left(x,y\right)\rightarrow\left(y,-x\right)$  is the rule for

• a 90 degree clockwise rotation around the origin

• a 90 degree counterclockwise rotation around the origin

• a 180 degree rotation around the origin