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2014-05-26T21:57:35+03:00
P/2 = l +L
l + L = 846
l + l + 2 = 846
2l + 2 = 846
2l = 846 - 2
2l = 844
l = 844/2
l = 422
L = 422 + 2
L = 424
1 5 1
2014-05-26T21:59:11+03:00
SP=L+l=846mm

846mm=84,6cm
L-2=l

L+l=84,6
L+L-2=84,6
2L=84,6+2
2L=86,6
L=43,3
l=43,3-2
l=41,3