alleryতিনটি বৃত্তকলার পরিমাপ হল 120, 90 এবং 60 degrees। চতুর্থ বৃত্তকলাটির কোণ কত?
A60 degrees
B70 degrees
C80 degrees
D90 degrees
Answer & Solution
Correct answer: D. 90 degrees
প্রথম তিনটির যোগফল 270 degrees, তাই শেষ বৃত্তকলাটি হল 360 minus 270 = 90 degrees।
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