Miter saws, table saws, and band saws have all been effectively used to cut segments. Use what you have in your shop. Any tool will need a fixture for accurately and safely cutting the segment angles. Bandsaws have the disadvantage that the segment edges will have to be cleaned up on a disk sander before gluing. If you have a table saw, consider making a wedgie sled. In recent years, it has become a very popular jig. Search the internet for the keyword “Segmentology”. It will take you to some good videos on the topic.