For angles in first quadrant, the reference angle is itself. In second quadrant, the equation would be 180 - x where x is the measure of the angle. In third quadrant, x - 180. Lastly, in the fourth quadrant, the reference angle is 360 - x. From the second set of angles in the given, the reference angles are.
(1) 135 ; RA = 180 - 135 = 45
(2) 240; RA = 240 - 180 = 60
(3) 270; RA = 90 (lies in the y - axis)
(4) 330; RA = 360 - 330 = 30
If my math is right the it’s 21.13
Work:
(17+18+18+19+20+21+21+21+22+22+22+22+
23+25+26)/15
I believe the answer to this question is the 3rd one
14 + 16 + 18= 48 so the answer would be 14
