, .
.
(. 16.1) β1 β2 , . β1 β2 . .
. 16.1.
, , , ,
(16.5)
(16.6)
(16.7)
mβ - β1 β2.
.
(16.8)
(16.9)
S1 = S2 = S. (16.7)
(16.10)
mβ γ S . γ S γ = 109028'.
i . , mA=mB=mAB,
(16.11)
, S1 = S2 = S γ = 90,
(16.12)
㳺 (16.11) (16.12)
(16.13)
(16.14)
l - .
, , , . , , .
(16.15)
(16.16)
S1 = S2 = S, γ = 90 , ,
(16.17)
, , . .
, , b =500 , mC=20 , mAB = 8 , (55),
³ . . ³ β1 β2, . . 22 . . ' , . , (), () . .
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. ' , (. 16.2). . . ( ) . , . 䳿 .
' . (. 16.2), :
(16.18)
(16.19)
, , , . , ; .
. 16.2.
(16.20)
S - ; b - ; w - .
SA = SB= SC= S; bB=b= =b, (16.10)
(16.21)
(16.22)
mA=mB=mC=mABC - ;
= β1 + β2 + wABC - 180.
(16.23)
(16.21) (16.23) ' S≈1350, b ≈2200, wABC ≈80, mβ=2", m ABC =5.
m.. = 11,5, m=6,2,
Ѳ ˲Ͳί Ѳ
, , C (. . 16.1) S1 i S2, A i . , .
. ³ A S1, S2. , S1 i S2 .
, (16.15) . mS S1 i S2 .
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(16.24)
̳ γ = 90.
(16.25)
(16.26)
mA = mB=mAB
(16.27)
γ = 90 m= mAB.
. , ,
(16.28)
, γ = 90,
(16.29)
, , , . , , mC=10 mAB=5 (16.29)
, , ,
(16.30)
Ѳ
, , , .
C (. 16.3) β S. β AB AC, S , B .
. 16. 3.
, β' , AB AC.
(16.31)
mβ β mS S
(16.32)
mA=mB=mAB
(16.33)
(16.34)
(16.33) (16.34) . , , β - , , , β ≤ 90, S ≤ b.
, β = 90 S=b,
(16.35)
, ,
(16.36)
, b=250 ,
mAB=10 . S=100 , , β=45, mβ=10", =1
m=1 .
-
mβ ρ ; -
dz , . ,
, , , , .
, , , , (. 16.4). C γ1 γ2, . . , , .
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. 164
. .