Two angles are supplementary if the sum of their measures is 180^(∘).
m∠4=124^(∘)
Practice makes perfect
Two angles are supplementary if the sum of their measures is 180^(∘). With this in mind, we can create an equation to demonstrate this relationship.
m∠3 + m∠4= 180^(∘)
We can find m∠4 by substituting the given value, m∠3=56^(∘), into the equation.
