Circle O has tangent AB and secant AC as shown. arc BC measures 4x+2-. arc BE measures 2x-10. What is the measure of arc CB
Angle(A) = ½( arc(BC) - arc(BE) )
50 = ½( (4x + 20) - (2x - 10) )
50 = ½( 4x + 20 - 2x + 10 )
50 = ½( 2x + 30 )
50 = x + 15
x = 35
Can you finish this problem? ...
