What triangle is a 30-60-90 triangle ?

When talking about 30-60-90 triangles it is most helpful to look at their angles. One will be a 90 degree or right angle, theother will be a 60 degree and the final one will be the 30 degree.

Step-by-step explanation:

To find their lengths.

They hypotenuse if 2 the length of the shortest length, if you are given the shortest side simply multiply by two to get the hypotenuse. If you are given the hypotenuse divide it by two to get the shortest side. To get the middle side multiply the short side by most equations wont ask you to simplify that.

none of the above.

for one of the equations to be used in the process, there has to be a term in the equation since squared is .

since there is only a term in the first equation, we cannot derive a from completing the square.

solving with completing the square