Ex 5.2, 6 (iv) - Chapter 5 Class 7 Lines and Angles

Transcript

Ex 5.2, 6 In the given figures below, decide whether l is parallel to m (iv) Here, ∠CHF + ∠CHG = 180° 72° + ∠CHG = 180° ∠CHG = 180° − 72° ∠CHG = 108° Now, For lines l and m, with transversal n ∠ BGH and ∠ CHG are alternate interior angles and they are not equal as ∠BGH ≠ ∠CHG (98° ≠ 108°) As alternate interior angles are not equal, lines l and m are not parallel.