If ray AC bisects angle A (∠BAC), it means that angle A is divided into two equal parts by ray AC.
Given that the measure of angle BAD (∠BAD) is 46 degrees, we can use the following relationship to find the measure of angle BAC (∠BAC):
\[ \text{m BAC} = \text{m BAD} + \text{m DAC} \]
Since ray AC bisects angle A, we have:
\[ \text{m DAC} = \text{m BAD} = 46^\circ \]
Therefore,
\[ \text{m BAC} = \text{m BAD} + \text{m DAC} = 46^\circ + 46^\circ = 92^\circ \]
So the measure of angle BAC (∠BAC) is 92 degrees.