Yechish : ichki burchaklar teng bo’ladi ya’ni α bilan 50 gradus teng to’ladi

T
K
EST_N 2
1
X

E

F

D

α
.

50

B

C

A

Yechish : ichki burchaklar teng bo’ladi ya’ni α bilan 50 gradus teng to’ladi
5 0+x=180 javob…x=130
X=130 E

2.

35

x
C
B
A ^D

Y echish :BA va CD lardi kesishtramiz ya’ni 90 gradusta kesishadi.

X +35=90 javob…x=55
X=55 C

3

X
. C

B
A

50



E D
Yechish : oson yo’li BC va BD perpendikulyar bo’lgan xolda x=90+50 ga teng bo’ladi.
X=140 javob…x=140

A
C

2x+155
4.

<sup>3x+105

D

β
B</sup>
Y echish : 2X+15=3X-10 β=2 25+15
X=25 β=65
javob…x=65
D
5 . c
E ^D K 110
₄₀

^70
F _x
A B
Y echish : K nuqta va B nuqtalardi davom etiramiz.
X+70=180 X+110+40=180
X=110 X=30
javob…x=30
C
6 .
x-12+2x=360
x=124 javob… 68 E
7.


A B
_β F 45
K ₁₁₅
X


^β
D C E
Yechish : FE kesmani davom etiramiz
β +115=180 45+65=x
x= 110
β=65 javob…x=110 C

8 . ^B ₅₀ ^F

^C ₁₁₀

<sup>70
E

40
A
D


x+40+110=180 javob….30 B
x=30


9 . 4x+20=180 javob….40 B
x=40


1 0. B</sup> _α ^{A 140+120+x=360}
_F x=100


_D ⁶⁰ _E ⁷⁰ _C
^{javob….100
1 1.}
B A

C
40
<sub>100

100 H
E F α D</sub>

Yechish : 100+α= 180

α=80
90+100+90+x=360 javob…80
X=80 D

1 2. B A

C X
150
_{D 115}

140
E 155

_{F K}

Yechish : eng oson yo’li

x= 2(4(150-140)+(155-115))
x=160
^javob….160 A