Kosinuslar teoremasi — 9-sinf Geometriya test savollari

1.Uchburchak tomonlari a = 7 sm, b = 8 sm, c = 13 sm. c ga qarshi C burchakni toping.

• A)60°
• B)150°
• C)90°
• D)120°

2.Uchburchak tomonlari 13, 14, 15 sm. Eng katta tomon (15) ga qarshi burchakning kosinusini toping.

• A)$\frac{4}{5}$
• B)$\frac{3}{5}$
• C)$\frac{12}{13}$
• D)$\frac{5}{13}$

3.a = 16 sm, b = 10 sm, C = 60°. c tomonni toping.

• A)196 sm
• B)26 sm
• C)6 sm
• D)14 sm

4.a = 5 sm, b = 3 sm, C = 120°. c tomonni toping.

• A)8 sm
• B)7 sm
• C)√34 sm
• D)4 sm

5.a = 10 sm, b = 10 sm, C = 120°. c tomonni toping.

• A)10√3 sm
• B)20 sm
• C)5√3 sm
• D)10 sm

6.a = 9 sm, b = 12 sm, C = 90°. c tomonni toping.

• A)15 sm
• B)21 sm
• C)3 sm
• D)225 sm

7.a = 6 sm, b = 6 sm, C = 90°. c tomonni toping.

• A)6√2 sm
• B)6 sm
• C)12 sm
• D)6√3 sm

8.a = 10 sm, b = 10 sm, C = 60°. c tomonni toping.

• A)10√3 sm
• B)20 sm
• C)10 sm
• D)5√3 sm

9.Tomonlari 8, 5, 7 bo‘lgan uchburchakda 7 ga qarshi burchakni toping.

• A)60°
• B)90°
• C)120°
• D)45°

10.Tomonlari 3, 4, 5 bo‘lgan uchburchakda eng katta burchakni toping.

• A)60°
• B)53°
• C)120°
• D)90°