Doira bo‘laklari yuzi — 9-sinf Geometriya test savollari

1.R = 8 sm, markaziy burchak 90°. Segment yuzini toping (sektor yuzi − uchburchak yuzi).

• A)16π − 32 sm² (≈18,27 sm²)
• B)32 sm²
• C)16π + 32 sm²
• D)16π sm²

2.Sektor yuzi 15π sm², radiusi 10 sm bo‘lsa, markaziy burchakni (gradusda) toping.

• A)54°
• B)60°
• C)45°
• D)72°

3.R = 9 sm, markaziy burchak 120°. Sektor yuzini toping.

• A)27π sm²
• B)13,5π sm²
• C)81π sm²
• D)54π sm²

4.Doira yuzi 100π sm², sektor markaziy burchagi 72° bo‘lsa, sektor yuzini toping.

• A)72π sm²
• B)10π sm²
• C)20π sm²
• D)40π sm²

5.R = 10 sm, markaziy burchak 90°. Sektor yuzini toping.

• A)25π sm²
• B)50π sm²
• C)12,5π sm²
• D)100π sm²

6.R = 6 sm, markaziy burchak 60°. Sektor yuzini toping.

• A)12π sm²
• B)3π sm²
• C)6π sm²
• D)18π sm²

7.R = 12 sm, markaziy burchak 180° (yarim doira). Sektor yuzini toping.

• A)144π sm²
• B)72π sm²
• C)36π sm²
• D)24π sm²

8.R = 5 sm, markaziy burchak 144°. Sektor yuzini toping.

• A)20π sm²
• B)15π sm²
• C)5π sm²
• D)10π sm²

9.R = 10 sm, markaziy burchak 36°. Sektor yuzini toping.

• A)5π sm²
• B)36π sm²
• C)20π sm²
• D)10π sm²

10.Doira 8 ta teng sektorga bo‘lingan (R = 6 sm). Har bir sektorning yuzini toping.

• A)6π sm²
• B)2,25π sm²
• C)9π sm²
• D)4,5π sm²