You probably have an intuitive idea of what a circle is: the shape of a basketball hoop, a wheel or a quarter. You may even remember from high school that the radius is any straight line that starts ...

A connected introduction of angle measure and the sine function entails quantitative reasoning. Journal Information The Mathematics Teacher (MT), an official journal of the National Council of ...

Trigonometry is the branch of math that studies triangles, with a particular focus on the relationships between angles and the lengths of corresponding sides. Interestingly enough, the trigonometric ...