Finish the proof Given: angle, A, B, D, \cong, angle, D, C, A, comma∠ABD≅∠DCA, start overline, B, A, end overline, is perpendicular to, start overline, A, D, end overline
BA
⊥
AD
and start overline, A, D, end overline, is perpendicular to, start overline, D, C, end overline, .
AD
⊥
DC
.

Prove: triangle, B, A, D, \cong, triangle, C, D, A△BAD≅△CDA.