What is the reason for statement 4 in this proof? OA. Transitive Property of Equality
Given: AABC is an isosceles triangle where AB = BC.
Prove: m2 BAC = m BCA
B.
definition of midpoint
OC.
definition of parallel lines
B
OD.
Reflexive Property of Equality
A
D
Reason
Proof:
Statement
1. Let ABC be an isosceles triangle
where AB= BC
2. Create point Don AC so that BD
bisects LABC as shown.
given
constructing an angle
bisector
definition of angle
bisector
3. m_ABD = m_ DBC
4. BD = BD
5. AABD ACBD
SAS
Corresponding angles of
congruent triangles are
Jequal.
6. m2 BAC = m_ BCA