Two lines are highlighted on a random right triangle. The goal is to select the trigonometric function corresponding to the length of the rad dashed line divided by the solid green line. Click the button for the case shown to get the next question. If you make a mistake the correct choice will be highlighted. You need to get 20 correct choices before time runs out.[br][br]A popup will show your results when either time runs out or you get enough correct answers. Select "OK" to try again.