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Authored by Quyền Hồng
Mathematics
9th Grade

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10 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Độ dài của một đường tròn là thì bán kính của đường tròn đó là:
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Độ dài cung của đường tròn có bán kính bằng:
3.
FILL IN THE BLANK QUESTION
2 mins • 1 pt
Cho hình vẽ. Điền vào chỗ trống
Nếu độ dài cung bằng thì số đo cung bằng
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Cho vuông tại có , góc bằng nội tiếp đường tròn tâm . Khi đó độ dài cung nhỏ bằng
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Diện tích hình tròn có đường kính bằng
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Cho hình tròn bán kính . Diện tích hình quạt tròn ứng với cung được tính theo công thức:
(với là độ dài cung )
(với là độ dài cung )
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Cho đường tròn tâm O đường kính , bán kính . Điểm M thuộc (O) sao cho góc BAM = 60°.
Tính diện tích hình quạt AOM .
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