In the past I struggled with cutting cakes! When you have an event, you want to make sure that all your guests get a slice of the cake! Here is a simple cutting guide for you to insure you are getting all the servings from your cake. The chart shows the straight line method as well as the concentric method.
If you have a caterer or a friend cutting your cake for you, this a something that can be left close to the cake as a reference!