I have three equal sides .All my angles are same. i am perfectly balanced. Who am I?, Two of my sides are equal .The third one is different. I still stay strong. Who am I?, All my sides are different. None of my angles are equal. I look uneven but complete. Who am I?, All my angles are less than 90 degree. None of them is wide or straight .I look sharp at every corner. Who am I?, I have one angle that is exactly 90 degree . I help in corners and buildings. I stand straight and strong.Who am I?.

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