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একটি বৃত্তের ব্যাসার্ধ 9 cm। এর দীর্ঘতম জ্যা-এর দৈর্ঘ্য কত?

A18 cm
B9 cm
C12 cm
D15 cm
Answer & Solution
Correct answer: A. 18 cm
দীর্ঘতম জ্যা হলো ব্যাস, যা ব্যাসার্ধের দ্বিগুণ, সুতরাং 18 cm।
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