what is this mean that angle between the two lines is equal to the angle between their perpendiculars
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The planes and perpendiculars form a quadrilateral with two 90 degrees angles. The opposite angles are equal.
Imagine you look at the intersecting planes from the end and imagine the two perpendiculars coming up. Do
Imagine you look at the intersecting planes from the end and imagine the two perpendiculars coming up. Do
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bcoz both are of 90
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