Question

50 POINTSS!!!

Answer 1

(A) Either of
• rotation 180° about point B
• reflection across point B

(B) If the transformation is rigid, the corresponding sides and angles are congruent.

(C) The sequence of letters tells you the correspondence.
  AB ⇔ DB
  AC ⇔ DE
  BC ⇔ BE
  ∠A ⇔ ∠D
  ∠ABC ⇔ ∠DBE
  ∠C ⇔ ∠E