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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