Question

please answer question number 7

Answer 1

 the angles are a-d,a,a+d
.so a-d+a+a+d=180 degree
3a=180 degree
a=60 degree
given that a-d/a=1/120(60-d)/60=
1/120120-2d=1d=119/2
so angles in radians will be
60-119/2=1/2 degree,
60degree,60+119/2=239/2 degree in radians
 anlgles will be pi/360,
pi/3,
239pi/360.

Answer 2

120 x = (x+y)/2


240 x = x +y

239 x = y

239x + x + 120 x = 180
360 x = 180

x = 1/2

So the angles are 60