The central angle corresponding to AOB is half of the 8pi/9 radians mentioned, meaning that the central angle of AOB is 4pi/9.
Converting that to degrees:
4pi/9 180 degrees
-------- * -------------------- = 80 degrees.
1 pi
What questions I mean there is no questions
140 / 100 * X = 56
X = 56 * 100 / 140 = 5600 / 140 = 40
Distribute the negative sign to the 4x and 11 making it 3x+5y-4-4x-11 and combine like terms
