Two angles are complementary if the sum of their measures is 90^(∘).
m∠2=78^(∘)
Practice makes perfect
Two angles are complementary if the sum of their measures is 90^(∘). With this in mind, we can create an equation to demonstrate this relationship.
m∠1 + m∠2= 90^(∘)
We can find m∠2 by substituting the given value, m∠1=12^(∘), into the equation.
