在一个三角形中如果一个角是另一个角的2倍�们称这种三角形为倍角三角形.如图1倍角 abc中∠a=2∠b∠a∠b∠c的对边分别记为 Template




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tomski在一个三角形中如果一个角是另一个角的2倍�们称这种三角形为倍角三角形.如图1倍角 abc中∠a=2∠b∠a∠b∠c的对边分别记为 coloring