Answer
$m∠B$ = $46^{\circ}$
Work Step by Step
we know sum of all three angles of triangle is $180^{\circ}$
$m∠A+m∠B+m∠C$=$180^{\circ}$
$67^{\circ}+m\angle B+67^{\circ}$ = $180^{\circ}$
$m∠B$= $180^{\circ}−134^{\circ}$
$m∠B$ = $46^{\circ}$
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