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证明两线垂直可采用以下方法: 1.证两直线的夹角等于90°,或证两直线的夹角等于已知直角。 2.利用相交直
Prove that the two lines can be perpendicular to the following methods: 1. Verify that the angle between the two lines is equal to 90°, or verify that the angle between the two lines is equal to the known right angle. 2. Use intersecting straight