Can you make a half circle using only fifth?

Yes, you can create a half circle using only fifths by stacking them in a way that approximates the curvature of a circle. For example, if you take a series of notes that are a perfect fifth apart, they can outline a semicircular pattern when arranged correctly. However, the result will be an angular shape rather than a smooth curve, as fifths create distinct intervals that do not naturally form a continuous arc.