Aylana uzunligi — 9-sinf Geometriya test savollari

1.R = 15 sm bo‘lgan aylananing uzunligi 100 sm ga yaqin bo‘lishi uchun π ≈ 3,14 qabul qilib, aylana uzunligini yaqin butun songa hisoblang.

• A)≈47,1 sm
• B)≈70,65 sm
• C)≈188,4 sm
• D)≈94,2 sm

2.Ikkita aylananing uzunliklari 24π sm va 40π sm. Ularning radiuslari nisbatini toping.

• A)9:25
• B)3:5
• C)2:3
• D)5:3

3.Aylananing uzunligi 100 sm ga yaqin bo‘lishi uchun radiusi taxminan qancha bo‘lishi kerak (π ≈ 3,14, yaqin butun songa)?

• A)≈50 sm
• B)≈16 sm
• C)≈8 sm
• D)≈32 sm

4.R = 6 sm bo‘lgan aylananing uzunligini toping.

• A)6π sm
• B)36π sm
• C)12π sm
• D)24π sm

5.R = 9 sm bo‘lgan aylananing uzunligini toping.

• A)18π sm
• B)81π sm
• C)36π sm
• D)9π sm

6.Aylana uzunligi 20π sm. Uning radiusini toping.

• A)40 sm
• B)20 sm
• C)5 sm
• D)10 sm

7.Diametri 14 sm bo‘lgan aylananing uzunligini toping.

• A)49π sm
• B)28π sm
• C)14π sm
• D)7π sm

8.Aylana uzunligi 16π sm. Uning diametrini toping.

• A)32 sm
• B)8 sm
• C)16 sm
• D)4 sm

9.Aylana radiusi 2 marta kattalashtirilsa, uzunligi necha marta ortadi?

• A)√2 marta
• B)4 marta
• C)3 marta
• D)2 marta

10.Aylana uzunligi 62,8 sm (π ≈ 3,14). Uning radiusini toping.

• A)31,4 sm
• B)5 sm
• C)10 sm
• D)20 sm