1. Not congruent by SAS (angle not included between marked sides).
2. Not congruent by SAS (angles are not the included angles for the marked sides).
3. △ABD ≅ △CBD (SAS: AB ≅ CB, ∠ABD ≅ ∠CBD, BD ≅ BD).
4. Not congruent by SAS (right angle is not the included angle for the marked sides).
5. △DEG ≅ △FEG (SAS: DE ≅ FE, ∠DEG ≅ ∠FEG, EG ≅ EG).
6. △ABC ≅ △CDA (SAS: AB ≅ CD, ∠BAC ≅ ∠DCA, AC ≅ CA).
7. Not congruent by SAS (angles are not the included angles for the marked sides).
8. Not congruent by SAS (given angle is not the included angle for the given sides).
9. △ADB ≅ △CDB (SAS: AD ≅ CD, ∠ADB ≅ ∠CDB, BD ≅ BD).
Parent Tip: Review the logic above to help your child master the concept of triangle congruency worksheet.
