6.3 Equations in Parallel/Perpendicular Form

Writing Equations of Lines Parallel & Perpendicular to a Given Line Through a Point | Algebra | Study.com

Identifying Parallel and Perpendicular Lines From Equations | Algebra | Study.com

If Two Straight Lines Are Perpendicular to the Same Line, Prove that They Are Parallel to Each Other. - Mathematics | Shaalaa.com

Determine whether each statement is true or false. (a) Two lines parallel to a third line are parallel. (b) Two lines perpendicular to a third line are parallel. (c) Two planes parallel to a third plane are parallel. (d) Two planes perpendicular to a third plane are parallel. (e) Two lines parallel to a plane are parallel. (f) Two lines perpendicular to a plane are parallel. (g) Two planes parallel to a line are parallel. (h) Two planes perpendicular to a line are parallel. (i) Two planes either

Theorem 6.6 - Lines parallel to same lines are parallel to each other