### Home > PC > Chapter 2 > Lesson 2.3.7 > Problem2-162

2-162.

Below are two of the special angles that are used in the unit circle. Identify the radian measure for the angles shown. Remember counter-clockwise angles are positive and clockwise angles are negative.

Special angles are at the $\frac{\pi}{6}$, $\frac{\pi}{3}$, $\frac{\pi}{2}$, or at the $\frac{\pi}{4}$ radians.