Circle

(the database of solved problems)

All the problems and solutions shown below were generated using the Circle Calculator.

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ID	Problem	Count
1	Find the area $ A $ of a circle if radius $r = \frac{ 25 }{ 2 }$.	322
2	Find the circumference $ C $ of a circle if diameter $d = \frac{ 15 }{ 2 }$.	263
3	Find the area $ A $ of a circle if diameter $d = 36$.	190
4	Find the area $ A $ of a circle if diameter $d = 56$.	158
5	Find the diameter $ d $ of a circle if area $A = \frac{ 2011 }{ 10 }$.	131
6	Find the area $ A $ of a circle if radius $r = \frac{ 132 }{ 5 }$.	129
7	Find the area $ A $ of a circle if ???.	127
8	Find the area $ A $ of a circle if radius $r = 20$.	120
9	Find the area $ A $ of a circle if circumference $C = 6\pi$, radius $r = \frac{ 11 }{ 2 }$ and diameter $d = 60$.	84
10	Find the area $ A $ of a circle if ???.	83
11	Find the radius $ r $ of a circle if diameter $d = \frac{ 41 }{ 5 }$.	77
12	Find the area $ A $ of a circle if area $A = \frac{ 5447 }{ 50 }$.	75
13	Find the radius $ r $ of a circle if diameter $d = 26$.	74
14	Find the area $ A $ of a circle if diameter $d = 8\, \text{ft}$.	74
15	Find the area $ A $ of a circle if circumference $C = 5$.	72
16	Find the diameter $ d $ of a circle if diameter $d = 26$.	64
17	Find the area $ A $ of a circle if radius $r = 65$.	47
18	Find the area $ A $ of a circle if diameter $d = 15$.	41
19	Find the radius $ r $ of a circle if area $A = \frac{ 5447 }{ 50 }$.	34
20	Find the area $ A $ of a circle if radius $r = 535$.	30
21	Find the area $ A $ of a circle if ???.	27
22	Find the circumference $ C $ of a circle if diameter $d = 15$.	20
23	Find the radius $ r $ of a circle if diameter $d = \frac{ 15 }{ 2 }$.	18
24	Find the area $ A $ of a circle if area $A = 10$.	17
25	Find the area $ A $ of a circle if radius $r = 40$.	16
26	Find the area $ A $ of a circle if circumference $C = 5$.	16
27	Find the area $ A $ of a circle if area $A = 4$, circumference $C = 90$, radius $r = 67$ and diameter $d = 12$.	15
28	Find the area $ A $ of a circle if radius $r = 10$.	15
29	Find the area $ A $ of a circle if area $A = 65$.	14
30	Find the area $ A $ of a circle if ???.	14
31	Find the diameter $ d $ of a circle if diameter $d = 26$.	12
32	Find the area $ A $ of a circle if radius $r = 31\, \text{mm}$.	11
33	Find the area $ A $ of a circle if radius $r = 5\, \text{mm}$.	10
34	Find the area $ A $ of a circle if radius $r = 8$.	9
35	Find the area $ A $ of a circle if radius $r = 7\, \text{ft}$.	8
36	Find the circumference $ C $ of a circle if diameter $d = 7.5\, \text{mm}$.	7
37	Find the circumference $ C $ of a circle if area $A = 2826\, \text{cm}^2$, circumference $C = 188.4\, \text{cm}$, radius $r = 30\, \text{cm}$ and diameter $d = 60\, \text{cm}$.	7
38	Find the area $ A $ of a circle if radius $r = 2$.	6
39	Find the area $ A $ of a circle if area $A = 5361\, \text{mi}^2$.	6
40	Find the area $ A $ of a circle if radius $r = 9\, \text{in}$.	6
41	Find the area $ A $ of a circle if area $A = 153.938\, \text{mm}^2$.	6
42	Find the area $ A $ of a circle if radius $r = 5.4\, \text{cm}$.	5
43	Find the area $ A $ of a circle if radius $r = 12.5\, \text{mm}$.	5
44	Find the area $ A $ of a circle if area $A = 16\, \text{mm}^2$.	5
45	Find the area $ A $ of a circle if radius $r = 13.4\, \text{cm}$.	5
46	Find the area $ A $ of a circle if radius $r = 3.8\, \text{cm}$.	5
47	Find the radius $ r $ of a circle if circumference $C = 9$, radius $r = 4$ and diameter $d = 8$.	5
48	Find the area $ A $ of a circle if radius $r = 10.4\, \text{cm}$.	5
49	Find the area $ A $ of a circle if radius $r = 3.8\, \text{mm}$.	5
50	Find the area $ A $ of a circle if circumference $C = 313$.	5