Two Lines Are Intersected By A Third Line. Two Horizontal Parallel Lines Are Intersected By A Third Line. The Third Line Intersects The Top Line And Forms 4 Angles. Labeled Clockwise, From Uppercase Left, The Angles Are 1, 2, 4, 3. The Third Line Intersects The Bottom Line And Forms 4 Angles. Labeled Clockwise, From Uppercase Left, The Angles Are 5, 6, 8, 7. If Angle2 Is-Congruent-To Angle6, Which Must Be True About Angle2? Angle2 Is-Congruent-To Angle5 Angle2 Is Complementary To Angle5. Mangle2 = Mangle8 Angle2 Is Supplementary To Angle8.. If the first line is intersected and forms a 90 degree angle, that means that all other angles formed from the intersected line are also equal to 90 degrees. 2 understand that when two parallel lines are intersected by a third line, the angles formed are related.

Learn and test your knowledge of angles formed by intersecting lines, such as adjacent, vertical, corresponding, and alternate angles. Recognize that $$\angle 2$$∠2 and $$\angle 6$$∠6 are congruent, which means they have the same measure understand that $$\angle 8$$∠8 and $$\angle 6$$∠6 are supplementary. See definitions, examples, and practice questions for this.