To'g'ri burchakli uchburchaklarni yechish — 8-sinf Geometriya test savollari

1.To'g'ri burchakli uchburchakning gipotenuzasi c=10 sm va o'tkir burchagi a=50°. a katetni toping (sin50°»0,7660).

• A)7,66 sm
• B)6,43 sm
• C)8,66 sm
• D)5,0 sm

2.Masalada (c=10 sm, a=50°) b katetni toping (cos50°»0,6428).

• A)6,43 sm
• B)7,66 sm
• C)3,21 sm
• D)9,27 sm

3.To'g'ri burchakli uchburchakning gipotenuzasi c=10 sm va o'tkir burchagi a=50° bo'lsa, b o'tkir burchakni toping.

• A)40°
• B)50°
• C)140°
• D)45°

4.To'g'ri burchakli uchburchakning kateti a=6 sm va o'tkir burchagi b=22°. a o'tkir burchakni toping.

• A)68°
• B)22°
• C)44°
• D)90°

5.Masalada (a=6 sm, b=22°) c gipotenuzani toping (cos22°»0,9272).

• A)6,47 sm
• B)5,56 sm
• C)6,90 sm
• D)13 sm

6.Masalada (a=6 sm, b=22°) b katetni toping (tg22°»0,4040).

• A)2,42 sm
• B)14,85 sm
• C)3,64 sm
• D)1,21 sm

7."To'g'ri burchakli uchburchakni yechish" nimani anglatadi?

• A)ma'lum tomon va burchaklar bo'yicha noma'lum tomon va burchaklarni topishni
• B)uchburchakning yuzini hisoblashni
• C)uchburchakning perimetrini topishni
• D)uchburchak chizishni

8.To'g'ri burchakli uchburchakni ma'lum ikkita elementiga ko'ra hisoblashning nechta asosiy holi ko'rib chiqiladi?

• A)4 ta
• B)2 ta
• C)3 ta
• D)6 ta

9.Gipotenuzasi c=8 sm va o'tkir burchagi a=30° bo'lgan to'g'ri burchakli uchburchakning a katetini toping.

• A)4 sm
• B)4√3 sm
• C)8 sm
• D)2 sm

10.Masalada (c=8 sm, a=30°) b katetni toping.

• A)4√3 sm
• B)4 sm
• C)8 sm
• D)2√3 sm