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Q.

The exterior angle of an equilateral triangle is

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a

acute angle

b

obtuse angle

c

straight angle

d

reflex angle

answer is B.

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Detailed Solution

An exterior angle of a triangle is equal to sum fo its opposite interior angles

In an equilateral triangle all angles are equal and each measures 60°

 The exterior angle of an equilateral triangle =60°+60°=120°

The measure 120° is an obtuse angle

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The exterior angle of an equilateral triangle is