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.
= ( ) + .
(: 23 + 2 = 25 .)
= () + .
(: 42 + 1 = 43 .)
CD = ().
(: 18 .)
AF = ( ( ) + ) / 2.
(: (38 + 2 ) / 2 = 20 .)
AF = BG1.
BG = ( 3 ( ) + ) / 4.
(: (90 + 12 ) / 4 = 25,5 .)
BG = = DI.
1 = 2 .
AL = 1/5 - 0,5 .
(: 38 / 5 = 7,6 .)
A1L, .
= ( ) + .
(: 42 + 2 = 44 .)
, .
FG1 .
LM = .
G1G3 = 1/4FG1.
G1G2 = 1/4G1G3.
G3G4 = 1 .
G4 G2 G.
HN = 2,5 .
G N I.
= 1/3 BG.
.
OP = OP1 = = 1,5 .
OR = 16 .
OR1 = 13 .
PRP1 R1.
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