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 | 20.2 | 8.1 | 25.3 | 27.7 | |||||
---|---|---|---|---|---|---|---|---|---|

b | 52.8 | 56.0 | 62.8 | 56.3 | |||||

c | 58.9 | 65.3 | 47.1 | 58.5 | |||||

A° | 13.4 | 26.1 | 16.5 | ||||||

B° | 63.4 | 63.2 | 64.4 |