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Find the value of the unknown exterior angle x in the following diagrams : |
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Answer» (i) ∠x = 50° + 70° = 120° (∵ The exterior angle of the triangle is equal to the sum of its two interior opposite angles.) (ii) ∠x = 45° + 65° = 110 (∵ The exterior angle of the triangle is equal to the sum of its two interior opposite angles.) (iii) ∠x = 30° + 40° = 70° (∵ The exterior angle of the triangle is equal to the sum of its two interior opposite angles.) (iv) ∠x = 60° + 60° = 120° (∵ The exterior angle of the triangle is equal to the sum of its two interior opposite angles.) (v) ∠x = 50° + 50° = 100° (∵ The exterior angle of a triangle is equal to the sum of its two interior opposite angles.) |
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