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 | 26.3 | 15.9 | 21.9 | 14.7 | |||||
---|---|---|---|---|---|---|---|---|---|

b | 61.0 | 55.1 | 49.2 | 71.5 | |||||

c | 51.2 | 44.8 | 54.7 | 75.8 | |||||

A° | 16.0 | 25.0 | 31.9 | ||||||

B° | 70.9 | 61.4 | 67.6 |