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


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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.

3x+105

D

β
B

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

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 α A 140+120+x=360
F x=100


D 60 E 70 C
javob….100
1 1.
B A

C
40
100

100 H
E F α D

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






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