The reference angle for an angle whose measure is -440 is 60 80 100

The reference angle for an angle whose measure is -440 is  80.

Reference angle--

It is the angle which is made from the terminal side of the given angle and it is always made by taking x-axis as a reference.

Here we are given a angle whose measure is:

   -440.

This means that the angle covers more than one rotation and ends in the fourth quadrant.

Hence, the reference angle is:

-440+360=80

the answer is c. 23/3