# Ex 6.2, 1 (vi) - Chapter 6 Class 7 Triangle and its Properties

Last updated at Sept. 3, 2021 by Teachoo

Last updated at Sept. 3, 2021 by Teachoo

Transcript

Ex 6.2, 1 (vi) Find the value of the unknown exterior angle x in the following diagrams:In ∆PQR, ∠QPS = x ∠Q = 30° ∠R = 60° We know that, Exterior angle is sum of interior opposite angles ∠QPS = ∠Q + ∠R x = 30° + 60° x = 90°

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