Euclid's Elements Book I, Proposition 9: To bisect a rectilinear angle.
Level: High School, SAT Prep, College geometry.
Let the angle AOB be the given rectilinear angle. It is the required to
The Elements: Books I-XIII
In its broad sense, education refers to any act or experience that has a formative effect on the mind, character, or physical ability of an individual...In its technical sense education is the process by which society, through schools, colleges, universities, and other institutions, deliberately transmits its cultural heritage--its accumulated knowledge, values, and skills--from one generation to another. George F. Kneller, Introduction to the Philosophy of Education (New York: John Wiley and Sons, 1971.)