Respuesta :

The key step is to realize that <BOE = 1/2(arcBJE + arcDC) = 1/2 (arc 170 + arc 44) 
<BOE = 1/2 (214) = 107
So <DOB + BOE = 180o
<DOB + 107 = 180
<DOB = 180 - 107 = 73
B <<<< Answer