If you are taking a Geometry class, studying for the ACT, or SAT you will encounter the 45-45-90 right triangle. Here are 7 terrific resources to help.

45 45 90 Video Special rules 45 45 90 This videos covers the rules of 45 45 90 triangles, and works several example problems of finding side length.

45-45-90 Triangle Calculator After looking at most of the 45 45 90 calculators I think this one is the easiest to use. It comes in really handy to check your work.

SAT Prep 45-45-90 This video is really helpful if you are preparing for the SAT and you trying to learn more about the 45 45 90 triangle.

Regents Prep Special Right Triangles This website is produced by a school system, and I always find there information very helpful. This page has 10 questions that review special right triangles including the 45 45 90 triangle. Each question has an answer along with a summary of how to derive the answer.

MooMooMath 45 45 90 This page includes three videos, the characteristics of a 45 45 90 triangle, and several example problems.

Isosceles Right Triangle This page by the Math page reviews the properties of a 45 45 90 triangle (isosceles right triangle) and has several applications with answers included.

Special Right Triangle Song Thanks to the power of YouTube you can find a song for almost anything. Although this song is not exclusively about the 45 45 90 triangle, a large portion of the song does focus on this special right triangle.

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# 7 terrific resources for 45 45 90 triangle

Thursday, June 25, 2015

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