Equilateral Triangle

(the database of solved problems)

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

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ID	Problem	Count
1	Find the side $ a $ of an equilateral triangle if altitude $h = 15\, \text{cm}$.	1579
2	Find the side $ a $ of an equilateral triangle if side $a = 12\, \text{m}$.	1476
3	Find the side $ a $ of an equilateral triangle if ???.	483
4	Find the side $ a $ of an equilateral triangle if circumcircle radius $R = 5\, \text{cm}$.	260
5	Find the side $ a $ of an equilateral triangle if altitude $h = 15$.	184
6	Find the side $ a $ of an equilateral triangle if altitude $h = 26\, \text{cm}$.	176
7	Find the side $ a $ of an equilateral triangle if side $a = 5\, \text{mm}$.	176
8	Find the side $ a $ of an equilateral triangle if incircle radius $r = 17\, \text{cm}$.	175
9	Find the area $ A $ of an equilateral triangle if side $a = 12$.	169
10	Find the side $ a $ of an equilateral triangle if circumcircle radius $R = 8\, \text{cm}$.	166
11	Find the side $ a $ of an equilateral triangle if side $a = 2\, \text{mm}$, altitude $h = 2\, \text{cm}$, perimeter $P = 2\, \text{cm}$, area $A = 2\, \text{cm}$, circumcircle radius $R = 2\, \text{cm}$ and incircle radius $r = 2\, \text{cm}$.	161
12	Find the side $ a $ of an equilateral triangle if side $a = 6\, \text{m}$.	153
13	Find the side $ a $ of an equilateral triangle if incircle radius $r = 8\, \text{cm}$.	152
14	Find the side $ a $ of an equilateral triangle if altitude $h = 6\, \text{cm}$ and perimeter $P = 6\, \text{cm}$.	145
15	Find the side $ a $ of an equilateral triangle if side $a = 10\, \text{cm}$.	143
16	Find the side $ a $ of an equilateral triangle if side $a = 10\, \text{cm}$.	141
17	Find the side $ a $ of an equilateral triangle if perimeter $P = 60\, \text{cm}$.	136
18	Find the side $ a $ of an equilateral triangle if circumcircle radius $R = 14\, \text{cm}$.	134
19	Find the side $ a $ of an equilateral triangle if side $a = 8\, \text{mm}$.	122
20	Find the side $ a $ of an equilateral triangle if altitude $h = 15\, \text{cm}$.	110
21	Find the side $ a $ of an equilateral triangle if altitude $h = 36\, \text{cm}$.	108
22	Find the side $ a $ of an equilateral triangle if ???.	105
23	Find the side $ a $ of an equilateral triangle if side $a = 5\, \text{km}$.	104
24	Find the side $ a $ of an equilateral triangle if side $a = 2\, \text{mm}$.	99
25	Find the side $ a $ of an equilateral triangle if side $a = 15\, \text{cm}$.	90
26	Find the side $ a $ of an equilateral triangle if incircle radius $r = 10\, \text{cm}$.	87
27	Find the side $ a $ of an equilateral triangle if incircle radius $r = 4\, \text{cm}$.	79
28	Find the side $ a $ of an equilateral triangle if incircle radius $r = 4\, \text{cm}$.	75
29	Find the side $ a $ of an equilateral triangle if side $a = 12\, \text{cm}$.	75
30	Find the side $ a $ of an equilateral triangle if area $A = 2.5\, \text{cm}$.	71
31	Find the side $ a $ of an equilateral triangle if side $a = 10\, \text{mm}$.	66
32	Find the side $ a $ of an equilateral triangle if circumcircle radius $R = 12\, \text{cm}$.	66
33	Find the side $ a $ of an equilateral triangle if side $a = 6\, \text{cm}$.	63
34	Find the side $ a $ of an equilateral triangle if circumcircle radius $R = 7\, \text{cm}$.	55
35	Find the area $ A $ of an equilateral triangle if side $a = 8\, \text{ft}$.	54
36	Find the side $ a $ of an equilateral triangle if side $a = 30\, \text{m}$.	54
37	Find the side $ a $ of an equilateral triangle if altitude $h = 9\, \text{cm}$.	50
38	Find the side $ a $ of an equilateral triangle if perimeter $P = 60\, \text{cm}$.	50
39	Find the side $ a $ of an equilateral triangle if circumcircle radius $R = 7\, \text{cm}$.	47
40	Find the side $ a $ of an equilateral triangle if side $a = 3\, \text{mm}$.	44
41	Find the side $ a $ of an equilateral triangle if area $A = 1000\, \text{cm}$.	40
42	Find the side $ a $ of an equilateral triangle if side $a = 5$.	37
43	Find the side $ a $ of an equilateral triangle if circumcircle radius $R = 9\, \text{cm}$.	34
44	Find the area $ A $ of an equilateral triangle if incircle radius $r = 8$.	34
45	Find the side $ a $ of an equilateral triangle if side $a = 30\, \text{mm}$.	33
46	Find the side $ a $ of an equilateral triangle if side $a = 4$.	32
47	Find the area $ A $ of an equilateral triangle if incircle radius $r = 17$.	30
48	Find the side $ a $ of an equilateral triangle if side $a = 10$.	29
49	Find the altitude $ h $ of an equilateral triangle if side $a = 6$.	29
50	Find the side $ a $ of an equilateral triangle if perimeter $P = 18\, \text{cm}$.	28