It's a funny name, but Triptych's (three images side by side) are a common project for photographers. Often you'll see them in matted form, but for this project it will be done in Photoshop. It looks the best when all of the photos are the same aspect ratio and orientation, so I would recommend cropping and resizing as necessary first. You can see in the example that they all the same aspect ratio and it makes it much more unified and clean. This handout will walk you though the rest of the process.