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Please help me understand this

Please help me understand this-example-1
User NamNH
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1 Answer

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Explanation:

always remember : the sum of all angles in a triangle is 180°.

that means the angle at A is also 60°.

and since all 3 angles are equal, this has to be an equilateral triangle (all 3 sides are equal).

therefore, x = 13

User CmKndy
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