Corner seams are typically used for the top and bottom of a piece of fabric. There are three different types of corner seams:
1. French seam: This is a straight line that goes from one side to the other, going through the center of the fabric.
2. Overlock seam: This is also a straight line that goes from one side to the other, but it is sewn into two pieces before it crosses over itself.
3. Blind hem: This is where you sew both sides together at an angle, making sure not to go through any part of the fabric in between them.