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 $h = 15\, \text{cm}$.	235
2	Find the side $ a $ of an equilateral triangle if altitude $h = 15$.	184
3	Find the area $ A $ of an equilateral triangle if side $a = 12$.	169
4	Find the side $ a $ of an equilateral triangle if side $a = 12\, \text{m}$.	133
5	Find the side $ a $ of an equilateral triangle if ???.	83
6	Find the side $ a $ of an equilateral triangle if side $a = 5\, \text{mm}$.	83
7	Find the side $ a $ of an equilateral triangle if side $a = 15\, \text{cm}$.	76
8	Find the side $ a $ of an equilateral triangle if side $a = 10\, \text{cm}$.	67
9	Find the side $ a $ of an equilateral triangle if incircle radius $r = 17\, \text{cm}$.	62
10	Find the side $ a $ of an equilateral triangle if side $a = 10\, \text{cm}$.	62
11	Find the side $ a $ of an equilateral triangle if side $a = 2\, \text{mm}$.	59
12	Find the side $ a $ of an equilateral triangle if side $a = 8\, \text{mm}$.	57
13	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 $r = 2\, \text{cm}$.	55
14	Find the side $ a $ of an equilateral triangle if altitude $h = 26\, \text{cm}$.	46
15	Find the side $ a $ of an equilateral triangle if side $a = 5$.	37
16	Find the area $ A $ of an equilateral triangle if incircle radius $r = 8$.	34
17	Find the side $ a $ of an equilateral triangle if circumcircle radius $R = 5\, \text{cm}$.	34
18	Find the side $ a $ of an equilateral triangle if side $a = 4$.	32
19	Find the side $ a $ of an equilateral triangle if circumcircle radius $R = 14\, \text{cm}$.	31
20	Find the area $ A $ of an equilateral triangle if incircle radius $r = 17$.	30
21	Find the side $ a $ of an equilateral triangle if side $a = 30\, \text{m}$.	30
22	Find the side $ a $ of an equilateral triangle if incircle radius $r = 8\, \text{cm}$.	30
23	Find the altitude $ h $ of an equilateral triangle if side $a = 6$.	29
24	Find the side $ a $ of an equilateral triangle if side $a = 6\, \text{m}$.	29
25	Find the side $ a $ of an equilateral triangle if side $a = 10$.	29
26	Find the side $ a $ of an equilateral triangle if side $a = 8$.	28
27	Find the side $ a $ of an equilateral triangle if incircle radius $r = 10\, \text{cm}$.	27
28	Find the side $ a $ of an equilateral triangle if side $a = 2$.	26
29	Find the altitude $ h $ of an equilateral triangle if side $a = 15$.	22
30	Find the side $ a $ of an equilateral triangle if altitude $h = 36\, \text{cm}$.	21
31	Find the side $ a $ of an equilateral triangle if circumcircle radius $R = 8\, \text{cm}$.	20
32	Find the side $ a $ of an equilateral triangle if side $a = 5\, \text{km}$.	19
33	Find the side $ a $ of an equilateral triangle if side $a = 10$.	18
34	Find the circumcircle radius $ R $ of an equilateral triangle if side $a = 5$.	18
35	Find the side $ a $ of an equilateral triangle if side $a = 30$.	18
36	Find the area $ A $ of an equilateral triangle if side $a = 30$.	18
37	Find the side $ a $ of an equilateral triangle if circumcircle radius $R = 7\, \text{cm}$.	17
38	Find the altitude $ h $ of an equilateral triangle if side $a = 10$.	17
39	Find the side $ a $ of an equilateral triangle if side $a = 6\, \text{cm}$.	17
40	Find the area $ A $ of an equilateral triangle if circumcircle radius $R = 14$.	17
41	Find the side $ a $ of an equilateral triangle if incircle radius $r = 9$.	17
42	Find the side $ a $ of an equilateral triangle if perimeter $P = 18\, \text{cm}$.	17
43	Find the side $ a $ of an equilateral triangle if side $a = 3\, \text{mm}$.	17
44	Find the side $ a $ of an equilateral triangle if altitude $h = 6\, \text{cm}$ and perimeter $P = 6\, \text{cm}$.	17
45	Find the side $ a $ of an equilateral triangle if side $a = 15\, \text{m}$.	16
46	Find the side $ a $ of an equilateral triangle if side $a = 4\, \text{mm}$.	16
47	Find the area $ A $ of an equilateral triangle if circumcircle radius $R = 8$.	16
48	Find the side $ a $ of an equilateral triangle if side $a = 3$.	16
49	Find the side $ a $ of an equilateral triangle if perimeter $P = 60\, \text{cm}$.	15
50	Find the side $ a $ of an equilateral triangle if side $a = 6\, \text{mm}$.	14