What is the reference angle for 120°?

Question

maemae16 · Answer

30°

45 degrees

60°

120°

240°

maemae16 · Answer

@studyhoney @AloneS @benjar.lulab @crazynerd32 @Dragontears1128 @erinkb99 @Fifciol @ganeshie8 @Hannahsayshi @luffingsails @mathmate

luffingsails · Answer

What does reference angle really mean? Do you have the definition?

maemae16 · Answer

No i do not

luffingsails · Answer

Well, you know that 120 degrees is in the second quadrant, right? So the reference angle is the angle that "represents" 120 degrees by preserving all of the co-terminal angles.

mathmate · Answer

@maemae16
In math, if we know the definition of terms we are working with, and math would be VERY easy.

mathmate · Answer

*then

maemae16 · Answer

i was never given the definition

mathmate · Answer

lol, here it is: http://www.mathwarehouse.com/trigonometry/reference-angle/finding-reference-angle.php

shadowlegendx · Answer

1128, what could it mean

mathmate · Answer

The definition is explained in the above link.
If you want a short and dry definition, then 
a reference angle of a given angle is the acute angle it makes with the horizontal (x-) axis, always considered positive.

mathmate · Answer

Also
An acute angle is one which is less than 90 degrees, irrespective of sign.