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 | 28.3 | 19.0 | 15.1 | 10.6 | |||||
---|---|---|---|---|---|---|---|---|---|

b | 43.2 | 30.2 | 52.4 | 55.1 | |||||

c | 58.8 | 36.3 | 63.5 | 53.2 | |||||

A° | 15.4 | 32.3 | 17.3 | ||||||

B° | 69.0 | 67.8 | 63.4 |