Question

(3) An → m d In the figure, if Zcz Zd, then prove that line 1 || line m.​

Answer 1

periscope is an instrument for observation over, around or through an object, obstacle or condition that prevents direct line-of-sight observation from an observer's current position. In its simplest form, it consists of an outer case with mirrors at each end set parallel to each other at a 45° angle...

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