GRE Math Review 3 GEOMETRY - ETS Home

So the lengths of the sides are in the ratio x to x, to the positive square root of 2, times x, which is the same as the ratio 1 to 1 to the positive square root of 2. The other special right triangle is a 30º- 60º- 90º right triangle, which is half of an equilateral triangle, as shown in Geometry Figure 12 below. ................
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