Exploring reflection across y-axis


Exploring Reflection across y-axis

Drag Snoopy who is standing on AB in QI . 1) What do you notice to Snoopy in QII? 2) What is the length of segment AB and A'B' ? 3) Find the perpendicular distance from A to y-axis and A' to y-axis? Then explain what do you notice. 4) Is this the reflection across y-axis or x-axis? 5) Can you predict a general rule in change of the coordinates in the pre-image (what will be the new coordinates of the image)