once the maths teacher of class 7 told student that today we will prove that the sum of all three angle is 180° as shown in figure he told to draw any triangle ABC in the notebook further side BC was extended to D 4) what is the value of <1+ <2+<3 ?
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tyu
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yurrvyuuftjiyrhyygggdfffggg
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Do you want to prove that sum of truangle is 180° or you want to know the answer of <1+<2+<3.
Can you tell me?
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