Why first angle and third angle method is used and why second and fourth angle method is not used?\n \n\n\n\t\n \n\n\n\t\u00a0\n \n\n\n\t1. You can answer this question\n \n\n\n\t2. You can like the best answer\n \n\n\n\t3. You can share the question...\n
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