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OpenStudy (sicklefirebolt):
Triangle ABC has been rotated 90° to create triangle DEF. Using the image below, prove that perpendicular lines have opposite and reciprocal slopes. You must show all of your work, and it has to be written in a paragraph.
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OpenStudy (sicklefirebolt):
OpenStudy (sicklefirebolt):
please help! i'll fan and medal
OpenStudy (sicklefirebolt):
@aum could you help?
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