Question: Which characteristics will prove that triangle DEF is an acute isosceles triangle? A. Segment DE and EF are congruent to each other but not to

Which characteristics will prove that triangle DEF is an acute isosceles triangle?

A. Segment DE and EF are congruent to each other but not to DF and their slopes are not related

B. Segment DE and EF are congruent and their slopes are opposite reciprocals

C. Segment DE is larger than EF and their slopes are not related

D. Segment DE is larger than EF and their slopes are opposite reciprocals.

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