A proof written in paragraph form. parallel
71° 68 3 34 2 5x - 7 = 98 5x = 105 x = 21
parallel parallel parallel
alternate interior angles parallel Yes, you can use the Same Side Interior Angles Converse to show a∥b.
∠1 ≅ ∠2 x ∥ y Corresponding Angles Postulate ∠2 ≅ ∠3 Alternate Exterior Angles Converse
∠2 ≅ ∠3 ∠1 ≅ ∠2 Corresponding Angles Converse
parallel t2 t3 Transitive Property t6 t4
The slats can be named s1, s2... s16 top to bottom. Each slat is parallel to the one below it so s1∥s2, s2∥s3 and so on. Using the transitive property, you can conclude all the slats from s1 to s16 must be parallel to each other.