8 sinf Algebra Tekislikda tog’ri burchakli koordinatalar sistemasi. Funksiya tushunchasi

17-mavzu: 1-A 2-B 3-C 4-A 5-C 6-A 7-A 8-C 9-D 10-C

8 sinf geometriya

1.Ko’pburchak ichki va tashqi burchaklari.

1. Ko’pburchak ichki burchaklari yig’indisi 2880 bo’lsa , uning nechta tomoni bor? A) 16 B) 17 C) 18 D) 20
2. Agar to’rtburchakning uchtadan olingan burchaklari yig’indisi 26 bo’lsa uning eng katta burchagi necha gradusga teng?

1. 
   120 B) 130 C) 110 D) 140
   

3. Qavariq to’rtburchakning eng ko’pi bilan necha burchagi o’tmas mumkin ?
A) 1 B) 2 C) 3 D) 4
4. Muntazam ko’pburchakning bitta tashqi burhagi 15 bo’lsa , uning nechta tomoni bor ? A) 18 B) 20 C) 22 D) 24
5. Ko’pburchak ichki burchaklari va bitta tashqi burchagi yig’indisi 2600 ga teng bo’lsa , uning nechta tomoni bor? A) 14 B) 15 C) 16 D) 17
6. Ko’pburchaklar ichki burchaklarining yig’indisi har bir uchidan bittadan olingan tashqi burchaklari yig’indisidan 5 marta katta . Shu ko’pburchakning tomonlar soni nechta ? A) 10 B) 12 C) 16 D) 18
7. Qavariq beshburchak ichki burchaklari 3 , 4 , 5 , 6 , 7 sonlariga proporsional. O’rtacha burchagining gradus o’lchovini toping .

1. 
   72 B) 96 C) 108 D) 120
   

8. Qavariq tortburchak uchta ichki burchakgi yig’indisi 284 . To’rtinchi ichki burchaki burchagiga qo’shni bo’lgan tashqi burchagini toping .
A) 76 B) 104 C) 94 D) 86
9. Muntazam oltiburchakning eng katta va eng kichik diagonallari orasidagi burchakni toping . A) 30 B) 45 C)60 D) 90
10. Muntazam sakkizburchakning eng katta va eng kichik diagonallari orasidagi burchakni toping . A) 30 B) 45 C) 60 D) 90

2. Parallelogramm va uning xossalari.

1. Parallelogramm ikkita burchagi yig’indisi 118 ga teng . Uning katta burchagi gradus o’lchovini toping. A) 111 B) 121 C) 131° D) 101°
2. Parallelogramm burchaklari 5: 7 nisbatda . Uning kichik burchagi gradus o’lchovini toping. A) 65° B) 70° С) 75° D) 80°
3. Parallelogramm tomonlari nisbati 4 : 11 kabi . Perimetri 3,6 dm . Uning kichik tomonini toping . A) 4,8 cm B) 480 cm C) 48 cm D) 0,48 cm
4. Parallelogramm o’tkir burchagi bissektrisasi qarshi tomonni 5 va 7 ga teng bo’laklarga ajratsa , uning perimetrini toping .
A) 34 B) 36 C) 38 D) 34 yoki 38
5. Parallelogramm tomonlari 7 va 20 ga teng . Katta tomoniga o’tkazilgan bissektrisalari uni uchta qisimga ajratsa , kichik bo’lak uzunligini toping .
A) 4 B) 5 C) 6 D) 7
6. Parallelogramm tomonlari 14 va 9 ga teng . Katta tomoniga o’tkazilgan bissektrisalari uni uchta qismga ajratsa, kichik bo’lak uzunligini toping . A) 2 B) 3 C) 4 D) 5
7. ABCD parallelogrammning diagonallari O nuqtada kesishadi . Agar P_ABO – P_BOC=20 va P_ABCD=56 bo’lsa , uning katta tomonini toping .
A) 24 B) 18 C) 20 D) 22
8. Parallelogrammning o’tmas burchagi 150° . Kichik diagonali yon tomoniga perpendikulyar . Katta tomonni 7 ga teng bo’lsa , kichik diagonal uzunligini toping. A) 7 B) 3,5 C) 14 D) 21
9. Parallelogramm qo’shni tomonlari yig’indisi 32 ga , ayirmasi 8 bo’lsa , tomonlari uzunliklarini toping . A) 20 ; 12 B) 23 ; 9 C) 22 ; 10 D) 18 ; 14
10. Parallelogramm o’tmas burchagidan chiqarilgan balandliklari orasidagi burchak 72° . Uning o’tkir burchagini toping .
A) 36° B) 54° C) 72° D) 96°