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44-Mavzu. Aylana va doira
1. Agar aylananing radiusi 1 cm ga oshirilsa, uning uzunligi necha cm ga oshadi?
A) 1 B) 𝜋𝜋 C) 2𝜋𝜋 D) 2
2. Aylananing vatari uni 4:6 kabi nisbatdagi yoylarga ajratadi. Kichik yoyning
gradus o‘lchovini toping.
A) 144° B) 72° C)160° D) 140°
3. Aylanasining uzunligi 6√3𝜋𝜋 ga teng bo‘lgan doira yuzini toping.
A) 9𝜋𝜋 B) 18𝜋𝜋 C) 27𝜋𝜋 D) 81𝜋𝜋
4. Aylana ichidagi nuqtadan aylanagacha eng qisqa masofa 6, eng uzun masofa 12
bo‘lsa, aylana radiusini toping.
A) 8 B) 9 C) 12 D) 18
5. Aylana diametrining uchlaridan aylana urinmasigacha masofalar 2,6 va 1,6 ga
teng. Diametr uzunligini toping.
A) 1,8 B) 2 C) 2,2 D) 4,2
6. Markaziy burchakka mos yoy aylananing
3
5
qismiga teng. Shu markaziy
burchakni toping.
A) 216° B) 15° C) 144° D) 72°
7. Aylananing markaziy burchagi 40° ga teng. Shu markaziy burchakka mos yoyga
tiralgan aylanaga ichki chizilgan burchakni toping.
A) 40
°
B) 20
°
C) 60
°
D) 80
°
8. Aylanani AB vatar uni ikkita yoyga ajratadi. Bu yoylar 17:19 nisbatda. AB vatar
kichik yoyning ixtiyoriy nuqtasidan necha gradusli burchak ostida ko`rinadi?
A) 170
°
B) 190
°
C) 85
°
D) 95
°
9. Radiusi 5 cm bo‘lgan doiradagi 8 cm li vatar doira markazidan necha cm
uzoqlikda bo‘ladi ?
A) 3 B) 4 C) 2,6 D) 2,8
10. Aylana radiusi 5 ga, markaziy burchagi 45° ga teng bo‘lsa, u tiralgan yoy
uzunligini toping.
A)
4𝜋𝜋
5
B)
5𝜋𝜋
4
C)
2𝜋𝜋
5
D)
5𝜋𝜋
2
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