You can mirror an image in Google Docs by using the Flip tool. Here's how:
1.Open the Google Docs document where the image is located.
2.Click on the image you want to mirror to select it.
3.Click on the "Actions" menu at the top of the page.
4.Select "Flip horizontally" from the drop-down menu.
5.The image will be mirrored, and you can see the flipped version of the image in your document.
Note that this will only flip the image horizontally, and not vertically. If you want to flip the image vertically, you'll need to use a different tool, such as an image editing program like Adobe Photoshop or GIMP.