- 2 x 2, , .
.
. , ! .
Rhombi” - , . , 2 .
1 (2, 3, 4, 5) (6, 7, 8, 9) : 30,5–35,5 . : 112 (119.5, 129.5, 138, 149.5) (159.5, 170.5, 180.5, 192) .
. . . .
, .
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4 + 1 + 2 . .
15 . (4 + 4 + 4 + 1 + 2 . .) , .
, - .
= 4 . .
2 . . : 1 . ., 1 .
3 . . ( ): 2 . , 1 . .