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12 questions
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- 1. Multiple-choice2 minutes1 pt
What is the diameter of the circle in the image?
10
20π
20
100
- 2. Multiple-choice2 minutes1 pt
If the diameter of a circle is 4, what is the radius?
4
2π
4π
2
- 3. Multiple-choice2 minutes1 pt
If r = 4, d = ?
4
2
8
8π
- 4. Multiple-choice2 minutes1 pt
If d = 3, r = ?
6
3
1.5
1
- 5. Multiple-choice2 minutes1 pt
Fill in the blank. The circumference of a circle is the ________.
distance around it
space inside it
- 6. Multiple-choice30 seconds1 pt
What is the area of this circle?
4π
8π
16π
π
- 7. Multiple-choice30 seconds1 pt
What is the area of this circle?
25π
10π
π
5π
- 8. Multiple-choice30 seconds1 pt
What is the area of this circle?
12π
6π
144π
36π
- 9. Multiple-choice3 minutes1 pt
What is the area of the circle in the image?
9π
12π
12
36π
- 10. Multiple-choice3 minutes1 pt
What is the area of the circle in the image?
10
20π
100
100π
- 11. Multiple-choice30 seconds1 pt
What is the radius of a circle with an area of 49π?
49
10
7
14
- 12. Multiple-choice3 minutes1 pt
Find the circumference of the circle in the image.
10π
20π
100π
20
