Monday, June 22, 2015

7 resources for 30-60-90 Triangles

30-60-90 Triangles are one type of special triangles. They are important for many students because the SAT and Act ask several questions involving this special right triangle. Here are 7 helpful resources you can use to master the 30-60-90 triangle.

Free Math Help This page has several examples that demonstrate the relationship between the side lengths, and the angle measure of 30-60-90 triangles.

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Grade A Math This page does a great job of explaining how to find the missing sides of a 30 60 90 along with several example problems.

30-60-90 Right Triangle by radical prep. This video has 55,000 views on YouTube. It works several SAT type problems that involve a 30-60-90 triangle, and why it is important to memorize the ratio of the sides.

45-4-90 and 30-60-90 Triangles In this video by Patrick of JMT, he explains the difference between a 45-45-90 triangle, and a 30-60-90 triangle. This video is very helpful, very clear, and he has a very relaxed style.

30-60-90 Triangle MooMooMath This page has a helpful review of the characteristics of a 30-60-90 triangle, along with several shortcuts to use when finding side length.

Special right triangle song. I love this video. The song is not great, but the lyrics stick in your head, and it can really you help memorize the properties of special right triangles. The lyrics are included in the video description.

Finally, here are two helpful calculators that will calculate the side length of a 30-60-90 triangle. Calculators are handy in order to check your homework. I looked at several calculators and felt these are the easiest to use.

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