Equilateral Triangle

(the database of solved problems)

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

Select category

ID	Problem	Count
1	Find the side $ a $ of an equilateral triangle if altitude $h = 15\, \text{cm}$.	1359
2	Find the side $ a $ of an equilateral triangle if side $a = 12\, \text{m}$.	1204
3	Find the side $ a $ of an equilateral triangle if ???.	406
4	Find the side $ a $ of an equilateral triangle if altitude $h = 15$.	184
5	Find the side $ a $ of an equilateral triangle if side $a = 5\, \text{mm}$.	175
6	Find the area $ A $ of an equilateral triangle if side $a = 12$.	169
7	Find the side $ a $ of an equilateral triangle if circumcircle radius $R = 5\, \text{cm}$.	161
8	Find the side $ a $ of an equilateral triangle if incircle radius $r = 17\, \text{cm}$.	157
9	Find the side $ a $ of an equilateral triangle if perimeter $P = 60\, \text{cm}$.	130
10	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 $r = 2\, \text{cm}$.	124
11	Find the side $ a $ of an equilateral triangle if side $a = 10\, \text{cm}$.	124
12	Find the side $ a $ of an equilateral triangle if side $a = 8\, \text{mm}$.	122
13	Find the side $ a $ of an equilateral triangle if circumcircle radius $R = 8\, \text{cm}$.	121
14	Find the side $ a $ of an equilateral triangle if altitude $h = 26\, \text{cm}$.	118
15	Find the side $ a $ of an equilateral triangle if side $a = 10\, \text{cm}$.	117
16	Find the side $ a $ of an equilateral triangle if incircle radius $r = 8\, \text{cm}$.	115
17	Find the side $ a $ of an equilateral triangle if altitude $h = 6\, \text{cm}$ and perimeter $P = 6\, \text{cm}$.	110
18	Find the side $ a $ of an equilateral triangle if side $a = 6\, \text{m}$.	97
19	Find the side $ a $ of an equilateral triangle if side $a = 2\, \text{mm}$.	95
20	Find the side $ a $ of an equilateral triangle if side $a = 5\, \text{km}$.	84
21	Find the side $ a $ of an equilateral triangle if side $a = 15\, \text{cm}$.	84
22	Find the side $ a $ of an equilateral triangle if circumcircle radius $R = 14\, \text{cm}$.	83
23	Find the side $ a $ of an equilateral triangle if altitude $h = 36\, \text{cm}$.	82
24	Find the side $ a $ of an equilateral triangle if incircle radius $r = 10\, \text{cm}$.	80
25	Find the side $ a $ of an equilateral triangle if incircle radius $r = 4\, \text{cm}$.	75
26	Find the side $ a $ of an equilateral triangle if incircle radius $r = 4\, \text{cm}$.	71
27	Find the side $ a $ of an equilateral triangle if area $A = 2.5\, \text{cm}$.	63
28	Find the side $ a $ of an equilateral triangle if ???.	61
29	Find the side $ a $ of an equilateral triangle if side $a = 6\, \text{cm}$.	57
30	Find the area $ A $ of an equilateral triangle if side $a = 8\, \text{ft}$.	54
31	Find the side $ a $ of an equilateral triangle if side $a = 30\, \text{m}$.	53
32	Find the side $ a $ of an equilateral triangle if circumcircle radius $R = 7\, \text{cm}$.	47
33	Find the side $ a $ of an equilateral triangle if circumcircle radius $R = 12\, \text{cm}$.	46
34	Find the side $ a $ of an equilateral triangle if altitude $h = 15\, \text{cm}$.	42
35	Find the side $ a $ of an equilateral triangle if altitude $h = 9\, \text{cm}$.	40
36	Find the side $ a $ of an equilateral triangle if side $a = 10\, \text{mm}$.	38
37	Find the side $ a $ of an equilateral triangle if side $a = 5$.	37
38	Find the side $ a $ of an equilateral triangle if circumcircle radius $R = 7\, \text{cm}$.	36
39	Find the side $ a $ of an equilateral triangle if circumcircle radius $R = 9\, \text{cm}$.	34
40	Find the area $ A $ of an equilateral triangle if incircle radius $r = 8$.	34
41	Find the side $ a $ of an equilateral triangle if side $a = 4$.	32
42	Find the side $ a $ of an equilateral triangle if perimeter $P = 60\, \text{cm}$.	32
43	Find the area $ A $ of an equilateral triangle if incircle radius $r = 17$.	30
44	Find the side $ a $ of an equilateral triangle if side $a = 10$.	29
45	Find the altitude $ h $ of an equilateral triangle if side $a = 6$.	29
46	Find the side $ a $ of an equilateral triangle if perimeter $P = 18\, \text{cm}$.	28
47	Find the side $ a $ of an equilateral triangle if side $a = 8$.	28
48	Find the side $ a $ of an equilateral triangle if altitude $h = 61\, \text{cm}$.	27
49	Find the side $ a $ of an equilateral triangle if side $a = 3\, \text{mm}$.	27
50	Find the side $ a $ of an equilateral triangle if side $a = 2$.	26