In this lesson, we will explore the concept of the 30-60-90 triangle and learn all about it including its formula, definition, sides, area, and the rules that apply to this triangle.

Confused by 30-60-90 triangle rules? We explain how to use the special right triangle ratio and the proof behind the theorem, with lots of example questions.

What are the 30 60 90 triangle rules? The most important rule to remember is that this special right triangle has one right angle, and its sides are in an easy-to-remember consistent …

Aug 12, 2025 · Including definition, properties, calculator, rules, formulas, side lengths, and solved examples, this thorough tutorial has addressed the main features of the 30-60-90 triangle.

Aug 3, 2023 · From the above properties, we get some basic rules applicable in all 30-60-90 triangles. The three side lengths are always in the ratio of 1: √3: 2 and the shortest side is always the smallest angle (30°), while the longest side is always opposite the largest angles (90°).

Master 30-60-90 triangles with easy rules, side ratios, and step-by-step examples. Practice with Vedantu to boost your grades!

In the case of a 30-60-90 triangle, only 1 side needs to be known in order to find all the lengths of the other sides. To know whether a triangle is a 30-60-90 triangle, we only need to know two of …