Geometriya .VIII-sinf.II-chorak test. B-variant
1. To’g’ri mulohazalarni ko’rsating: 1) Markaziy simmetriyada ikkita mos kesmalar parallel. 2) O’q simmetriyasida
ikkita mos nurlar yo’nalishdosh. 3) Biror oltiburchak simmetriya o’qiga ega.
#1 1,2 #2 1,3 #3 2,3 #4 1,2,3 #5 1
2. A(-2;3),A
1
nuqta ox o’qiga nisbatan A nuqtaga simmetrik, A
2
esa oy o’qiga nisbatan A
1
nuqtaga simmetrik nuqta.A
2
nuqtaning koordinatalarini toping.
#1 (2;-3) #2 (-2;-3) #3 (2;3) #4 (-2;3) #5 (3;-2)
3. Teng yonli uchburchakning nechta simmetriya o’qi bor?
#1 0 #2 1 #3 2 #4 cheksiz ko’p #5 mavjud emas
4. Teng yonli uchburchakning uchidan o’tkazilgan balandligi undan perimetri 36 sm ga teng uchburchak kesadi.Agar
berilgan teng yonli uchburchakning perimetri 50 sm ga teng bo’lsa balandligining uzunligini hisoblang.
#1 12 sm #2 6 sm #3 16 sm #4 11 sm #5 21 sm
5. Teng yonli uchburchak ikki tomonining uzunligi 10 sm va 22 sm bo’lsa , asosi va yon tomonini toping.
#1 10,10 #2 6,16 #3 10,22 #4 6,12 #5 22,22
6. L to’g’ri chiziq ABC uchburchakning simmetriya o’qi .Uchburchakning perimetri 46 sm. AO=6,5 sm bo’lsa, shu
uchburchakning BC tomonini toping.
#1 13 sm #2 16,5 sm #3 17 sm #4 16 sm #5 12 sm
7. (-3; -5) nuqtaga koordinatalar boshiga nisbatan simmetrik nuqtaning koordinatalari nimaga teng?
#1 (-3;-5) #2 (3;-5) #3 (0;-5) #4 (3;5) #5 (5;3)
8. (0; 8) nuqtaga koordinatalar boshiga nisbatan simmetrik nuqtaning koordinatalari nimaga teng?
#1 (0;8) #2 (8;0) #3 (0;-8) #4 (8;5) #5 (5;5)
9. To’g’ri to’rtburchakning simmetriya o’qlari x= 2 va y=3. Uning uchlaridan biri A(7;5), y=3 to’g’ri chiziqqa
nisbatan simmetrik uchining koordinatasini toping.
#1 (-3;5) #2 (7;1) #3 (-3;1) #4 (-2;4) #5 (2;2)
10. Simmetriyadan unumli foydalangan ulug’rassomni toping.
#1 Ch.Axmarov #2 Ayvazovskiy #3 Leonardo da Vinchi #4 Benkov #5 A.Abdullayev
11. Tomoni 13 sm bo’lgan kvadrat yuzini toping
#1 169 sm
2
#2 225 sm
2
#3 900 sm
2
#4 625 sm
2
#5 2 sm
2
12. Tomoni 12 sm bo’lgan kvadrat yuzini toping
#1 169 sm
2
#2 225 sm
2
#3 900 sm
2
#4 625 sm
2
#5 144 sm
2
13. Perimetri 60 sm bo’lgan kvadratni yuzni toping.
#1 10sm
2
#2 20 sm
2
#3 100 sm
2
#4 225 sm
2
#5 60 sm
2
14. Tomonlari mos ravishda 5 sm vs 6sm bo’lgan to’g’ri to’rtburchakning perimetrini toping.
#1 20 sm #2 24 sm #3 30 sm #4 22 sm #5 11 sm
15. 5 m
2
= …sm
2
#1 50 #2 500 #3 5000 #4 50000 #5 500000
16. To’g’ri to’rtburchakning yuzi 72 sm
2
, bo’yi 9 sm.Perimetrini toping.
#1 17sm #2 8 sm #3 26 sm #4 16 sm #5 34sm
17. To’g’ri to’rtburchakning uzunligi 25% ga orttirildi.Uning yuzi o’zgarmasligi uchun enini necha prosentga
kamaytirish kerak?
#1 20 #2 16 #3 25 #4 18 #5 19,2
18. Kvadrat yuzini 36 marta kamaytirish uchun uning tamonini necha marta kichraytirish kerak?
#1 36 marta#2 72 marta#3 6 marta#4 8 marta#5 12 marta
19. Uchburchakning balandligi 25 sm, yuzi 125 sm
2
bo’lsa, uning asosini toping.
20.Togri burchakji uchburchakning b kateti 10 sm va c gipotenuzasi 12 sm bolsa,yuzini toping.
21. Agar to’g’ri to’rtburchakning tomonlari 4 marta orttirilsa, uning yuzi necha marta ortadi?
22.Tomonlari 10sm, 10sm, 12sm ga teng bolgan uchburchakning katta tomoniga tushirilgan balandligini toping.
23.ABC uchburchakda AB=5 sm BC=7sm va AC=10 sm bo’lsa BC tomonga tushirilgan balandlikni toping .
24.ABC uchburchak tomonlari AB=10 sm BC=4 sm va AC=8 sm bo’lsa, AB tomonga tushirilgan balandlikni toping.
25.To'gri burchakli uchburchak kateti 8 sm, uning gipo'tenuzadagi proeksiyasi esa 6,4 sm. Shu uchburchakning yuzini
toping.