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
101	Find the radius $ r $ of a circle if area $A = 430$.	3
102	Find the area $ A $ of a circle if radius $r = 11.5\, \text{mm}$ and diameter $d = 23\, \text{in}$.	3
103	Find the area $ A $ of a circle if diameter $d = 6.875\, \text{in}$.	3
104	Find the area $ A $ of a circle if diameter $d = 22.5\, \text{mm}$.	3
105	Find the area $ A $ of a circle if area $A = 3\, \text{mm}^2$.	3
106	Find the area $ A $ of a circle if area $A = 10$, circumference $C = \frac{ 157 }{ 50 }$, radius $r = 5$ and diameter $d = 2$.	3
107	Find the area $ A $ of a circle if radius $r = 4.625\, \text{in}$ and diameter $d = 48\, \text{in}$.	3
108	Find the area $ A $ of a circle if radius $r = 4.625\, \text{in}$ and diameter $d = 48\, \text{in}$.	3
109	Find the area $ A $ of a circle if diameter $d = 21\, \text{ft}$.	3
110	Find the area $ A $ of a circle if circumference $C = 62.8\, \text{mm}$.	3
111	Find the area $ A $ of a circle if radius $r = 129\, \text{in}$.	3
112	Find the circumference $ C $ of a circle if radius $r = 8$.	3
113	Find the circumference $ C $ of a circle if area $A = 201\, \text{cm}^2$ and radius $r = 3\, \text{cm}$.	3
114	Find the area $ A $ of a circle if circumference $C = 5$.	3
115	Find the area $ A $ of a circle if radius $r = 7\, \text{cm}$.	3
116	Find the radius $ r $ of a circle if radius $r = 6$.	3
117	Find the area $ A $ of a circle if radius $r = 2\, \text{mm}$.	3
118	Find the area $ A $ of a circle if circumference $C = 24030\, \text{mm}$.	3
119	Find the area $ A $ of a circle if area $A = 50\, \text{in}^2$, circumference $C = 25.06\, \text{mm}$, radius $r = 3.99\, \text{mm}$ and diameter $d = 7.98\, \text{in}$.	3
120	Find the area $ A $ of a circle if radius $r = 120\, \text{m}$.	3
121	Find the area $ A $ of a circle if area $A = 17430625\, \text{mm}^2$.	3
122	Find the circumference $ C $ of a circle if diameter $d = 1200$.	3
123	Find the area $ A $ of a circle if radius $r = \frac{ 25 }{ 2 }$.	3
124	Find the area $ A $ of a circle if area $A = \frac{ 5447 }{ 50 }$.	3
125	Find the area $ A $ of a circle if diameter $d = 0.235\, \text{m}$.	2
126	Find the area $ A $ of a circle if circumference $C = 2\pi$.	2
127	Find the circumference $ C $ of a circle if radius $r = 3454321$.	2
128	Find the circumference $ C $ of a circle if radius $r = 7$.	2
129	Find the diameter $ d $ of a circle if radius $r = 4\, \text{in}$.	2
130	Find the diameter $ d $ of a circle if circumference $C = 4$.	2
131	Find the area $ A $ of a circle if radius $r = 3$.	2
132	Find the diameter $ d $ of a circle if circumference $C = 18$.	2
133	Find the diameter $ d $ of a circle if circumference $C = \frac{ 279 }{ 10 }$.	2
134	Find the diameter $ d $ of a circle if circumference $C = \frac{ 203 }{ 5 }$.	2
135	Find the diameter $ d $ of a circle if circumference $C = \frac{ 63 }{ 10 }$.	2
136	Find the diameter $ d $ of a circle if circumference $C = 19$.	2
137	Find the diameter $ d $ of a circle if circumference $C = \frac{ 146 }{ 5 }$.	2
138	Find the area $ A $ of a circle if radius $r = \sqrt{ 10 }\, \text{mm}$.	2
139	Find the area $ A $ of a circle if area $A = 286\, \text{ft}^2$.	2
140	Find the area $ A $ of a circle if radius $r = 1\, \text{mm}$.	2
141	Find the area $ A $ of a circle if area $A = 10$, circumference $C = 5$, radius $r = \frac{ 157 }{ 50 }$ and diameter $d = 2$.	2
142	Find the area $ A $ of a circle if radius $r = 45\, \text{mm}$.	2
143	Find the diameter $ d $ of a circle if area $A = \frac{ 7693 }{ 2500 }$.	2
144	Find the diameter $ d $ of a circle if circumference $C = 20\, \text{m}$, radius $r = 3.1831\, \text{m}$ and diameter $d = 6.3662\, \text{m}$.	2
145	Find the circumference $ C $ of a circle if area $A = 115\, \text{cm}^2$.	2
146	Find the circumference $ C $ of a circle if radius $r = \frac{ 129 }{ 5 }$.	2
147	Find the area $ A $ of a circle if area $A = 286\, \text{ft}^2$.	2
148	Find the diameter $ d $ of a circle if radius $r = \frac{ 129 }{ 5 }$ and diameter $d = \frac{ 258 }{ 5 }$.	2
149	Find the diameter $ d $ of a circle if diameter $d = \frac{ 258 }{ 5 }$.	2
150	Find the circumference $ C $ of a circle if diameter $d = \frac{ 258 }{ 5 }$.	2