Uchburchakning ichki burchaklari yig‘indisi — 7-sinf Geometriya test savollari

1.Uchburchakning burchaklari x, 2x va 3x kattalikda. Uchburchakning eng katta burchagini toping.

• A)60°
• B)75°
• C)90°
• D)100°

2.Uchburchakning ikkita burchagi 42° va 68° ga teng. Uchinchi burchakni toping.

• A)60°
• B)65°
• C)70°
• D)75°

3.Uchburchakning tashqi burchagi 130° ga teng. Unga qo‘shni bo‘lmagan ikkita ichki burchakdan biri 55° bo‘lsa, ikkinchisini toping.

• A)65°
• B)70°
• C)75°
• D)80°

4.Uchburchak burchaklarining nisbati 2 : 3 : 4 kabi. Uchburchakning eng kichik burchagini toping.

• A)20°
• B)30°
• C)40°
• D)50°

5.Uchburchakning ichki burchaklari yig‘indisi har doim nechaga teng bo‘ladi?

• A)90°
• B)150°
• C)180°
• D)360°

6.Teng yonli uchburchakning asosidagi burchagi 65° ga teng. Uchidagi burchakni toping.

• A)40°
• B)45°
• C)50°
• D)55°

7.Uchburchakning tashqi burchagi haqida qanday xossa o‘rinli?

• A)U qo‘shni ichki burchakka teng
• B)U unga qo‘shni bo‘lmagan ikkita ichki burchak yig‘indisiga teng
• C)U har doim 90° ga teng
• D)U har doim ichki burchaklardan kichik bo‘ladi

8.Uchburchakning bitta burchagi 90° ga teng, qolgan ikkitasi esa o‘zaro teng. Shu ikki burchakning har birini toping.

• A)30°
• B)40°
• C)45°
• D)50°

9.Uchburchakning barcha uchta burchagi o‘tkir bo‘lishi mumkinmi?

• A)Yo‘q, hech qachon
• B)Ha, bo‘lishi mumkin (masalan, teng tomonli uchburchakda)
• C)Faqat teng yonli uchburchakda mumkin
• D)Faqat to‘g‘ri burchakli uchburchakda mumkin

10.Uchburchakda ikkita burchak bir vaqtda to‘g‘ri burchak (90°) bo‘lishi mumkinmi?

• A)Ha, har doim mumkin
• B)Yo‘q, chunki burchaklar yig‘indisi 180° dan oshib ketadi
• C)Faqat teng yonli uchburchakda mumkin
• D)Faqat teng tomonli uchburchakda mumkin