Right isosceles triangle ratios2/12/2024 ![]() These angles are special because of the values of their trigonometric functions (cosine, sine, tangent, etc.). The name comes from having one right angle (90°), then one angle of 30°, and another of 60°. For those interested in knowing more about the most special of the special right triangles, we recommend checking out the 45 45 90 triangle calculator made for this purpose.Īnother fascinating triangle from the group of special right triangles is the so-called "30 60 90" triangle. That is why both catheti (sides of the square) are of equal length. This right triangle is the kind of triangle that you can obtain when you divide a square by its diagonal. You have to use trigonometric functions to solve for these missing pieces. In such cases, the right triangle calculator, hypotenuse calculator, and method on how to find the area of a right triangle won't help. Sometimes you may encounter a problem where two or even three side lengths are missing.
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