Answer & Step-by-step explanation:
We are given that m∠1 = m∠2. We are to prove that line l is parallel to line m. So, let's make a proof. Your first statement should always be the given statement. You are given the statements. All we have to do is find the reasons for those statements.
- m∠1 = m∠2 → Given
- m∠1 = m∠3 → Vertical angles are equal
- m∠2 = m∠3 → Substitution
- l ║m → If corresponding angles are equal, then lines are parallel