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Thus ;
Sum of the interior angles of any triangle is 180° .
Subtract sides 128°
So :
The correct answer is Option four .
It 's an isosceles triangle if you look carefully. 2 Sides of the triangle are equal which is denoted by those marks. The angles opposite to the equal sides are always equal, so:
By angle sum property,
52 degrees is the answer: Option D :D
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