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Trigonometry
Question

Given that \( \vec { B A } \) bisects \( \angle D ...

Given that \( \vec { B A } \) bisects \( \angle D B C \) , which statement must be true? 

\( m \angle A B D = m \angle A B C \) 

\( \overline { A B } \cong \overline { B C } \) 

\( B \) is the midpoint of \( \overline { D C } \) 

\( m \angle D B C = 90 ^ { \circ }\) 

Answer

\(m\angle ABD = m\angle ABC\)

Solution
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