2 answers:
Answer:
(a) Option 3
(b) Option 1
(c) Option 2
Step-by-step explanation:
Given information: m∠ABC = m∠CBD
Prove: BC bisects ∠ABD.
Proof:
(Given)
Definition of congruent: Two angles are congruent if their measures are equal.
(Definition of bisect)
Definition of bisect: If a line divides an angle in two equal parts, then the line is called angle bisector.
BC bisects ∠ABD (Definition of bisect)
Hence proved.
Answer:
1)given
2)definition of congruent
3)definition of bisect
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