ProveIt! Two-Column Proofs Practice Tool

Proof: Parallels and Perpendiculars 3

ABF=40 $\^o$

BCD=40 $\^o$

line AD

perpendicular

line DC

line AB

perpendicular

line AD

1.

1.

BCD=40 $\^o$

line AB

perpendicular

line AD

line AD

perpendicular

line DC

ABF=40 $\^o$

line AB $\|\|$ line DC

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