If the sum of the measures of the three angles shown is 163° , what is the measure of ∠CEB ? Adjacent angles D E C, C E B, and B E A share the vertex point E. Angle D E C measures x degrees. Angle C E B measures negative 10 4 x degrees. Angle B E A measures 2 x 5 degrees. Responses 24° 24 degrees 53° 53 degrees 86° 86 degrees 139° 139 degrees