Respuesta :
1. RM = SN, TM = TN Addition Property of Equality
2. ∠T = ∠T Reflexive
3. RM + TM = SN + TN Substitution
4. RM + TM = RT, SN + TN = ST Betweeness
5. RT = ST CPCTE
6. Triangle RTN congruent to Triangle STM Given
7. RN = SM SAS
Answer:
It is proved that ∠A = ∠B.
Step-by-step explanation:
1. Given: AD=BC, BC⊥AE, AD⊥BE
2. Reflexive Property: ∠E = ∠E
3. LA: Triangle ADE congruent to Triangle BCE
4. Perpendicular lines form right angles: ∠D and ∠C are right angles.
5. CPCTE: ∠A = ∠B