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The right angle is symbolized by a small square, and its measure, 90°, is written to the right and above it. The angle placed to the right of the 90° angle is shown as an arc, and its measure, 30°, is written to the left of the arc. The angle above the right angle is also represented by an arc, and its measure, 60°, is written below said arc.
File:Bad drawing of a 30-60-90 triangle.svg. SVG development . The SVG code is . This trigonometry was created with a text editor. Licensing. Public ...
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The following other wikis use this file: Usage on ar.wikipedia.org دوال مثلثية; مثلثات قائمة خاصة; الجذر التربيعي ل 3
English: A set square with angles 90°, 60° and 30 ... You are free: to share – to copy ... Template:User straighten-out; Global file usage.
Then ABD is a 30°–60°–90° triangle with hypotenuse of length 2, and base BD of length 1. The fact that the remaining leg AD has length √ 3 follows immediately from the Pythagorean theorem. The 30°–60°–90° triangle is the only right triangle whose angles are in an arithmetic progression.