Trigonometry can be very difficult to get a hang of, and that's why it's so important to practice. This tool automatically generates new random triangle problems so that you can practice all of the different variations. We use a handy table to present several problems at once, and every column is a single triangle. You get some values to start with. Use those values to calculate and fill out the unknowns.
Your answers will be checked automatically and change color.

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Basic Right Triangle

The following triangles are all in the form of the basic 90° right triangle where side a is smaller than side b and c is the hypotenuse. The angle is opposite side a and smaller than angle .