等腰直角三角形有1条对称轴，即斜边的垂直平分线。等腰直角三角形是特殊的等腰三角形（有一个角是直角），也是特殊的直角三角形（两条直角边等），因此等腰直角三角形具有等腰三角形和直角三角形的所有性质（如三线[详细]
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