What are your chances of acceptance?
Duke University
UCLA
Unweighted GPA: 3.7
1.0
4.0
SAT: 720 math
200
800
| 800 verbal
200
800

#### Extracurriculars

Low accuracy (4 of 18 factors)

# How does a 30 60 90 triangle work?

Hey guys, I'm really confused about the whole concept of a 30 60 90 triangle and how it can be applied in practical situations or tests. I know it's really important for geometry and trig, but I just cannot wrap my mind around it. Anyone willing to help me out?

14 days ago

Sure, happy to help! 30-60-90 triangles are special right triangles named by their angle measures. This means one of the angles in these triangles is a right angle (90 degrees), and the other two angles are 30 degrees and 60 degrees. Here's a simple breakdown:

- The length of the hypotenuse (the side opposite the right angle) is twice the length of the shorter leg (the side that corresponds to the 30 degrees angle). Designating the shorter leg's length as 'a', the hypotenuse will be 2a.

- The longer leg (the side that corresponds to the 60 degrees angle) will have a length of asqrt(3).

So if you're given one side of a 30-60-90 triangle, you can determine the lengths of the other two sides using these rules.

In practical test situations, this concept is often used to find unknown lengths without resorting to trigonometric functionality or Pythagoras' theorem, saving time and effort. For example, if you're given the length of the hypotenuse and need to find the length of the shorter leg, you can simply take half of the hypotenuse's length because in a 30-60-90 triangle, the shorter leg is always half of the hypotenuse.

Remember to study this pattern and recognize a 30-60-90 triangle when you see one, as it will make solving for unknown sides a lot quicker and easier. It's an essential tool in cracking geometry problems!

14 days ago