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The exterior angle of the triangle is $3 x$ . Find $x$ .

Class 8Equations in GeometryLinear Equations

A60°
B20°
C40°
D120°

Step-by-Step Solution

An exterior angle equals the sum of the two opposite interior angles:

3 x = 50 + 70 = 120

, so

x = 40°

.

Answer: C) 40°

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