Two angles are supplementary. They have the following measures: m∠ACB=x° and m∠BCD=26° . What is the measure of ∠ACB ?(1 point) m∠ACB= °
If two angles are supplementary, then the sum of their measures is 180 degrees.
Therefore, m∠ACB + m∠BCD = 180 degrees.
Substituting the given values, we have x + 26 = 180.
Solving for x, we subtract 26 from both sides, resulting in x = 154.
Therefore, the measure of ∠ACB is 154 degrees.
m∠ACB = 154°.