📐 Matematika · Planimetriya · ★★★
Uchburchakning tomonlari 5, 7 va 8 ga teng. 7 ga teng tomon qarshisidagi burchakni toping.
- A)45°
- B)60°
- C)30°
- D)120°
👀 To'g'ri javob va tushuntirishni ko'rish
✓ B) 60°
💡 Kosinuslar teoremasi: cos α = (25 + 64 − 49)/(2 · 5 · 8) = 40/80 = 1/2, α = 60°.