The Khan Academy's variegated lessons can serve as a supplement to more traditional, face-to-face math instruction, providing students with helpful resources to tackle everything from basic to complex math. This comprehensive treatment of right triangles and trigonometry offers a balanced overview of a range of topics, starting with the Pythagorean Theorem and progressing through special right triangles, trigonometric ratios, modeling with right triangles, sine, cosine, and more. Each lesson is posted on a virtual video blackboard and questions and answers at the bottom of the screen encapsulate some of the most pressing and common difficulties that students may run into while learning these particular subjects.