2 8 Practice Proving Angle Relationships - Study with quizlet and memorize. ∠1 & ∠2 are vert. M∠1 + m∠3 = 180°. Unit 2 intro to mass and volume. The following theorems hold true for angles and can be used in proofs dealing with angles. If two angles are vertical angles, then they are congruent. M∠1 + m∠2 = 180°. Web unit 1 intro to area and perimeter.
M∠1 + m∠3 = 180°. Web unit 1 intro to area and perimeter. If two angles are vertical angles, then they are congruent. Unit 2 intro to mass and volume. M∠1 + m∠2 = 180°. Study with quizlet and memorize. The following theorems hold true for angles and can be used in proofs dealing with angles. ∠1 & ∠2 are vert.