Question

question 21 of 45 given that △abc≅△def, which of the following must be true? a. ∠d≅∠f b. ∠b≅∠e c. ∠a≅∠b d. ∠a≅∠f

Explanation:

Step1: Recall congruent - triangle property

When $\triangle ABC\cong\triangle DEF$, corresponding angles are congruent. That is, $\angle A\cong\angle D$, $\angle B\cong\angle E$, and $\angle C\cong\angle F$.

Answer:

B. $\angle B\cong\angle E$