
Hình tròn
Authored by Vũ anh
Mathematics
5th Grade

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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 1. Hình tròn là hình gồm tất cả các điểm cách đều một điểm gọi là:
Bán kính
Chu vi
Tâm
Đường kính
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 2. Đường kính của hình tròn gấp mấy lần bán kính?
1 lần
2 lần
3 lần
4 lần
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 3. Công thức tính diện tích hình tròn là:
S = d x 3,14
= 2 × 3,14 × r
S = r × r x r
r x r x 3,14
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 4. Một hình tròn có bán kính là 7 cm. Diện tích của hình tròn đó là:
49 cm²
154 cm²
38,5 cm²
153,86 cm²
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 5. Một hình tròn có đường kính 10 cm. Bán kính của hình tròn là:
20 cm
5 cm
10 cm
2 cm
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