### Home > CCA2 > Chapter 10 > Lesson 10.2.1 > Problem 10-102

Use reference angles, the symmetry of a circle, and the knowledge that tan

Draw the angle and corresponding right triangle in the first quadrant. Recall that tangent is opposite/adjacent, and label the side lengths. **Unit circle, right triangle in first quadrant, labeled as follows: vertical leg, 0.3640, angle opposite vertical leg, 20 degrees.**

Redraw your triangle in each of the other quadrants. Label the side lengths with the correct **Added to unit circle, right triangle in second, third, & fourth quadrants. Triangle in third quadrant, vertical leg labeled, negative 0.3640.**

One possible statement: tan**A small red arc, from the positive, x axis, to the hypotenuse, of the right triangle, in the third quadrant.**