A STAR HAS SIX IDENTIFALLY MATCHED POINTS. SUPPOSE YOU LINE UP TWO STARS DIRECTLY ON TOP OF EACH OTHER. WHAT IS THE LEAST NUMBER OF DEGREES THAT YOU CAN ROTATE THE TOP STAR SO THAT THE TWO STARS ARE PERFECTLY ALIGNED AGAIN?

The least number of degrees that you can rotate the top star so that the two stars are perfectly aligned again is 180 degrees.