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
251	Find the area $ A $ of a circle if circumference $C = 4\, \text{mm}$, radius $r = 2\, \text{mm}$ and diameter $d = 3\, \text{mm}$.	2
252	Find the area $ A $ of a circle if area $A = 900\, \text{mm}^2$ and circumference $C = 1290\, \text{mm}$.	2
253	Find the area $ A $ of a circle if radius $r = 6\, \text{mm}$.	2
254	Find the area $ A $ of a circle if area $A = 36\, \text{mm}^2$ and radius $r = 6\, \text{mm}$.	2
255	Find the area $ A $ of a circle if radius $r = \sqrt{ 13 }\, \text{mm}$.	2
256	Find the area $ A $ of a circle if circumference $C = 158\, \text{m}$.	2
257	Find the area $ A $ of a circle if diameter $d = \frac{ 81 }{ 2 }\, \text{mm}$.	2
258	Find the area $ A $ of a circle if radius $r = 4\, \text{mm}$.	2
259	Find the area $ A $ of a circle if diameter $d = 50\, \text{cm}$.	2
260	Find the area $ A $ of a circle if diameter $d = 3.356\, \text{in}$.	2
261	Find the area $ A $ of a circle if radius $r = 500\, \text{cm}$.	2
262	Find the area $ A $ of a circle if radius $r = 152\, \text{mm}$.	2
263	Find the area $ A $ of a circle if area $A = 300\, \text{mm}^2$.	2
264	Find the area $ A $ of a circle if diameter $d = 29.75\, \text{mm}$.	2
265	Find the area $ A $ of a circle if diameter $d = 7.5\, \text{ft}$.	2
266	Find the area $ A $ of a circle if radius $r = 20\, \text{mm}$.	2
267	Find the area $ A $ of a circle if radius $r = 20\, \text{mm}$.	2
268	Find the area $ A $ of a circle if diameter $d = 12\, \text{mm}$.	2
269	Find the area $ A $ of a circle if diameter $d = 12\, \text{mm}$.	2
270	Find the area $ A $ of a circle if area $A = 153\pi\, \text{mm}^2$.	2
271	Find the area $ A $ of a circle if area $A = 8.0848\, \text{in}^2$ and diameter $d = 5\, \text{in}$.	2
272	Find the diameter $ d $ of a circle if area $A = 20\, \text{m}^2$.	2
273	Find the area $ A $ of a circle if area $A = 1.9\, \text{mm}^2$.	2
274	Find the area $ A $ of a circle if radius $r = 0.95\, \text{mm}$.	2
275	Find the area $ A $ of a circle if area $A = 1.9\, \text{mm}^2$ and radius $r = 0.95\, \text{mm}$.	2
276	Find the area $ A $ of a circle if diameter $d = 21\, \text{mm}$.	2
277	Find the area $ A $ of a circle if radius $r = 10.5\, \text{mm}$ and diameter $d = 21\, \text{mm}$.	2
278	Find the area $ A $ of a circle if radius $r = 15\, \text{mm}$.	2
279	Find the area $ A $ of a circle if circumference $C = 68\, \text{mm}$.	2
280	Find the area $ A $ of a circle if circumference $C = 42\pi\, \text{mm}$.	2
281	Find the area $ A $ of a circle if diameter $d = 129800\, \text{m}$.	2
282	Find the area $ A $ of a circle if diameter $d = 100\, \text{m}$.	2
283	Find the area $ A $ of a circle if radius $r = 0.92\, \text{m}$ and diameter $d = 129800\, \text{m}$.	2
284	Find the area $ A $ of a circle if circumference $C = 3\, \text{in}$.	2
285	Find the area $ A $ of a circle if diameter $d = 20\, \text{ft}$.	2
286	Find the area $ A $ of a circle if diameter $d = 5\, \text{in}$.	2
287	Find the area $ A $ of a circle if circumference $C = 9\, \text{ft}$ and radius $r = 3.14\, \text{mm}$.	2
288	Find the area $ A $ of a circle if area $A = 40\, \text{mm}^2$ and radius $r = 10\, \text{mm}$.	2
289	Find the circumference $ C $ of a circle if area $A = 100\, \text{cm}^2$.	2
290	Find the area $ A $ of a circle if radius $r = 15\, \text{in}$ and diameter $d = 30\, \text{in}$.	2
291	Find the area $ A $ of a circle if circumference $C = 58\, \text{mm}$.	2
292	Find the area $ A $ of a circle if circumference $C = 176\, \text{in}$ and radius $r = 28\, \text{in}$.	2
293	Find the area $ A $ of a circle if circumference $C = 176\, \text{in}$.	2
294	Find the area $ A $ of a circle if radius $r = 1.875\, \text{mm}$.	2
295	Find the area $ A $ of a circle if diameter $d = 2.6\, \text{in}$.	2
296	Find the area $ A $ of a circle if circumference $C = 30\, \text{in}$.	2
297	Find the area $ A $ of a circle if radius $r = 1.5\, \text{mm}$.	2
298	Find the area $ A $ of a circle if radius $r = 4\, \text{ft}$.	2
299	Find the area $ A $ of a circle if circumference $C = 20\, \text{m}$.	2
300	Find the area $ A $ of a circle if area $A = 78.5\, \text{mm}^2$.	2