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Perpendicular and Parallel - Math is Fun - Maths Resources
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日期：2025-05-07
Perpendicular and Parallel Perpendicular It just means at right angles (90 ) to. The red line is perpendicular to the blue line in both these cases: (The little box drawn in the corner, means "at right angles", so we didn't really need to also show that i...看更多
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