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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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 **A°** is opposite side **a** and smaller than angle **B°**.

a | 21.9 | 17.1 | 20.0 | 29.2 | |||||
---|---|---|---|---|---|---|---|---|---|

b | 58.8 | 35.4 | 54.5 | 58.7 | |||||

c | 51.0 | 69.3 | 38.5 | 55.9 | |||||

A° | 23.8 | 30.6 | 16.6 | ||||||

B° | 70.3 | 61.1 | 74.0 |