What is a 30¡-60¡-90¡ Triangle?

Is it possible to take an equilateral triangle and cut it in half to make a 30-60-90 special triangle to make it easier to solve a problem? Why yes, of course! It's even possible to find the missing length without using the Pythagorean Theorem. Wondering how this is all done? Watch this video and the instructor will show just how it's all done.