Two angles, ∠1 and ∠2 , in a diagram are supplementary. If m∠1=77° , what equation can you write to solve for m∠2 ? Let m∠2=x°

The equation that can be written to solve for m∠2 is:

m∠1 + m∠2 = 180°

Substituting the given values, we have:

77° + x° = 180°