Angle BCE is 110 degrees. Because a straight line is 180 degrees, subtract that you the 70° and you'll get 110°. Sorry if that sounded confusing. Hope it helps
BCE IS 100 degrees not 110 , a triangle is 180 degrees . 70+30= 100. 180-100=80 ... so angle ACB = 80 . Since a straight line is also equal to 180, angle ACB +BCE = 180 . 180(value of straight line) - 80( angle ACB) = 100
