№1. Дано: АВСD – ромб, АЕ – бісектриса ∠ВАС, АС ВD = O, АЕ ВD = М, ∠АМО = 40°. Знайти: ∠АDС.
№2. Дано: АВСD – ромб, АС ВD = O, СK ⊥ KD, KО = 12 см, ∠ВАD = 4 ∠CВD. Знайти Р abcd.
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