Question: in abc shown below is congruent to given ...

In ΔABC shown below, is congruent to :

Given: ≅

Prove: The base angles of an isosceles triangle are congruent.

The two-column proof with missing statement proves the base angles of an isosceles triangle are congruent:

Statement	Reason
1. is an angle bisector of ∠ ABC.	1. by Construction
2.	2. Definition of an Angle Bisector
3. ≅	3. Reflexive Property
4. ΔABD ≅ ΔCBD	4. Side-Angle-Side (SAS) Postulate
5. ∠ BAC ≅ ∠ BCA	5. CPCTC

Which statement can be used to fill in the numbered blank space? (4 points)

	∠ DBA ≅ ∠ CDB
	∠ CAB ≅ ∠ ACB
	∠ ABD ≅ ∠ CBD
	∠ BDA ≅ ∠ BDC