, , , . , .
= d (. 34, ) = b 1 β 1 β 3.
d/ sin β 1 = b 1/sin β 2 = b 1/sin(180º β 1 β 3) = b 1sin(β 1 + β 3)
d = b 1[sin β 1/sin(β 1 + β 3). (30.1)
β 2.
β 1 + β 2 + β 3 = 180º (30.2)
.
fβ = (β 1 + β 2 + β 3) 180º
. . δ = fβ/ 3,
= β 1 + δ; = β2 + δ; = β 3 + δ.
(30.2) . (30.1) .
. .
. 34. :
;
.
(. 34, 6) , , b β,
d = .
, a = b β 90º.
6
.
, , , . - . , .
: , , .
(. 35). , . .
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. 35. :
;
. , , h b: h = b. b , .
. .
. 36 h , d 300. , , .
i, ' , . ' υ. ν.
. 36
h = J´B´ + A´J´ BB´,
A´J´ = i; BB ´ = υ.
h = h´ + i υ,
h´ = d tg ν.
h = d tg ν (υ i). (31.1)
. 36.
, (31.1) :
h = d tg ν.
, : , ; , ; , .
- . .
(. 37) . h 2, 3. , 1 . , , , (, , ), . : (10) .
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- .37. -
. -
- .
.
, , . . . .