4. Adjacent angles * (1 Point) One of two numbers whose product is 1. Two angles in the same plane with a common vertex and a common side but no common interior points. A comparison of two quantities by division. I 5. Ratio * (1 Point) One of two numbers whose product is 1. Two angles in the same plane with a common vertex and a common side but no common interior points. A comparison of two quantities by division. 6. Reciprocal (1 Point) One of two numbers whose product is 1. Two angles in the same plane with a common vertex and a common side but no common interior points. A comparison of two quantities by division.​