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If the sides of a triangle are produced in order, what will be the sum of extension angles formed ?

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If the sides of a triangle are produced in order, what will be the sum of extension angles formed ?

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Let ΔABC and the sides of the triangle is formed by exterior angles.

∠3 = ∠B + ∠C 

∠1 + ∠2 + Z∠3 = 2[∠A + ∠B + ∠C] 

= 2 x 180° = 360° 

∴ Sum of the exterior angles are 360°.

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