Question
Class 7MathematicsThe Triangle and Its Properties

In the given figure, find x.

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Verified Answer

In ∆ABC, we have

5x – 60° + 2x + 40° + 3x – 80° = 180° (Angle sum property of a triangle)

⇒ 5x + 2x + 3x – 60° + 40° – 80° = 180°

⇒ 10x – 100° = 180°

⇒ 10x = 180° + 100°

⇒ 10x = 280°

⇒ x = 28°

Thus, x = 28°