ПЛИЗ!ГЕОМЕТРИЯ!30 БАЛОВ
1). В ∆CDE DE = 5, CE = 4, C = 45°. Найдите сторону DE.
2). В ∆KLM KL = LM = 5, КМ = 6. Найдите косинус угла L.
3). В ∆OPQ O = 60°, P = 75°, OP = 8. Найдите сторону PQ.
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