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Mathematics 22 Online
OpenStudy (spyro517):

Triangle ABC has been rotated 90° to create triangle DEF. Using the image below, prove that perpendicular lines have opposite and reciprocal slopes.

OpenStudy (spyro517):

Can you get the picture or no?

OpenStudy (spyro517):

OpenStudy (spyro517):

How would I go about explaining this?

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