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 Find out what are the sides, hypotenuse, area and perimeter of your shape and learn about 45 45 90 triangle formula, ratio and rules If you want to know more about another popular right triangles , check out this 30 60 90 triangle tool and the calculator for special right triangles By Rich Zwelling, Apex GMAT Instructor Date 7th January, 21 Right Triangle In a previous piece, we covered the right triangle, also known as the isosceles right triangleThere is another socalled "special right triangle" commonly tested on the GMAT, namely the right triangle Like the isosceles right, its sides always fit a specific Solution This is a triangle in which the side lengths are in the ratio of x x√32x Substitute x = 7m for the longer leg and the hypotenuse ⇒ x √3 = 7√3 ⇒ 2x = 2 (7) =14 Hence, the other sides are 14m and 7√3m Example 6 In a right triangle, the hypotenuse is 12 cm, and the smaller angle is 30 degrees Special Right Triangles Proof Side lengths of a 30 60 90 right triangle