ProveIt! Two-Column Proofs Practice Tool

Proof: Congruent Triangles 5

D is midpoint of segment TN

D is midpoint of segment SA

segment ST $\|\|$ segment NA

1.

1.

angle

S

congruent

angle

A

angle

SDT

congruent

angle

ADN

D is midpoint of segment TN

TD = ND

D is midpoint of segment SA

SD = AD

segment ST $\|\|$ segment NA

3gon

DTS

congruent

3gon

DNA

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