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1. ∠A ও ∠B পরম্পর সম্পূরম কোণ । ∠A=115°  হলে  ∠ B =  কত?

  • A. 65 °
  • B. 65 °
  • C. 65 °
  • D. 65 °

Answer: Option A

Explanation:

∠A + ∠B = 180° [ ∠A ও ∠B সম্পূরক কোণ ]

বা, 115° + ∠B = 180°

বা, ∠B = 180° - 115° = 65°


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