Geometriya .VIII-sinf.III-chorak test. B-variant
1. Rombning yuzi formulasini toping. #1 S=a.h #2 S=
#3 S=a.b #4
#5 S= a
2
2. Trapetsiyaning asoslari 14 sm va 8 sm.Balandligi 5 sm bo’lsa uning yuzini toping.
#1 55 sm
2
#2 160 sm
2
#3 85 sm
2
#4 210 sm
2
#5 32,5 sm
2
3. Trapetsiyaning asoslari 4 sm va 9 sm.Balandligi 5 sm bo’lsa uning yuzini toping.
#1 55 sm
2
#2 160 sm
2
#3 85 sm
2
#4 210 sm
2
#5 32,5 sm
2
4. Asoslari 9 va 15 ga teng bo’lgan teng yonli trapetsiyaning diagonallari o’zaro perpendikulyar.Trapetsiyaning yuzini
toping.
#1 100 #2 64 #3 144 #4 25 #5 49
5. Trapetsiyaning yuzi 30 ga ,balandligi 5 ga teng bo’lsa, uning o’rta chizig’I qanchaga teng bo’ladi?
#1 15 #2 5 #3 7,5 #4 10 #5 6
6. Pifagor teoremasi formulasini toping.
#1 c
2
= a +b #2 c= a
2
+b
2
#3 c
2
=a
2
+b
2
#4 c
2
= a
2
-b
2
#5 b
2
= c
2
+a
2
7.To’g’ri burchakli uchburchakda a=9 , b= 12 bo’lsa , c ni toping
#1 10 #2 5 #3 15 #4 20 #5 25
8. To’g’ru burchakli uchburchakda a = 7 c=9 bo’lsa , b katetni toping.
#1 0,5 #2 4
#3 2
#4 4
#5
9. Uchburchakning tomonlari a = 17, b=20, c= 45 . Shu uchburchak to’g’ri burchaklimi?
#1 Yo’q #2 Ha #3 Aniqmas #4 Teng yonli #5 TJY
10.Uchta tomoniga ko’ra uchburchak yuzini toping. 4,13,15
#1 288 #2 108 #3 24 #4 60 #5 32
11. Teng tomonli uchburchakning tomoni 4 ga teng, uning yuzini toping.
#1 9 #2 4
#3 25 #4 9
#5 49
12. Teng tomonli uchburchakning tomoni 3 ga teng, uning balandligini toping.
#1 9 #2 8
#3 25 #4 18
#5 49
13. Teng tomonli uchburchakning tomoni 7 ga teng, uning balandligini toping.
#1 9 #2 8
#3 25 #4 18
#5 49
14. To’g’ri burchakli uchburchakning gipotenuzasi 25 sm,katetlari o’zaro 3:4 nisbatda.Shu uchburchakning katta
katetini toping.
#1 10 #2 15 #3 9 #4 12 #5 20
15. To’g’ri burchakli uchburchakning katetlaridan biri 12 sm,ikkinchisi esa gipotenuzadan 8 sm qisqa.Shu
uchburchakning gipotenuzasini ikkinchi katetga nisbatini toping.
#1 15 #2 16 #3
#4 5 #5 29
16. Teng tomonli uchburchakning balandligi 9 sm.Shu uchburchakka ichki chizilgan aylananing radiusini toping.
#1 3 #2 8 #3 6 #4 2,5 #5 5
17. Teng tomonli uchburchakning balandligi 24 sm.Shu uchburchakka ichki chizilgan aylananing radiusini toping.
#1 3 #2 8 #3 6 #4 2,5 #5 5
18. Katetlari 120 va 90 ga teng bo’lgan to’g’ri burchakli uchburchakka ichki chizilgan aylananing radiusini toping.
#1 10 #2 20 #3 30 #4 40 #5 8
19.Katetlaridan biri 8 ga teng bo'lgan to'g'ri burchakli uchburchak gipotenuzasining ikkinchi katetga nisbati 5:3 ga
teng. Uchburchakning yuzini toping.
20.To'gri burchakli uchburchakning gipotenuzasi 25 ga, katetlaridan biri 10 ga teng. Birinchi katetning gipotenuzadagi
proeksiyasini toping.
21. Aylana tashqarisidagi nuqtadan aylanaga ikkita urinma o’tkazilgan.Agar urinmalar orasidagi burchak 68
0
bo’lsa,aylananing urinish nuqtalari orasidagi katta yoyni toping.
22. Aylanani kesuvchi ikki vatari orasidagi burchaklardan biri 130
0
ga teng.Shu burchakka qo’shni bo’lgan
burchaklarning yig’indisini toping.
23. Aylananing qismini tashkil qiluvchi AB yoyiga mos keluvchi markaziy burchak necha gradus bo’ladi?
24. Markazi O bo’lgan aylananing AB yoyi 60
0
ga teng. Agar aylananing radiusi 12 sm ga teng bo’lsa, A nuqtadan OB
radiusgacha bo’lgan masofani toping.
25. Tashqi urinuvchi ikki aylana radiuslarining nisbati 4:5 kabi. Aylanalarning markazlari orasidagi masofa
18sm.Katta aylananing diametrini toping.
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