Final answer:
To find the length of BD, you need more information.
Step-by-step explanation:
To find the length of BD, you need to use the information given in the question. The equation ZDAC = ZBAD tells us that the angles ZDAC and ZBAD are equal. Since angles in a triangle add up to 180 degrees, we can find the measure of ZDAC by subtracting the measures of the other two angles in the triangle from 180. Once we know the measure of ZDAC, we can apply the properties of similar triangles and use the ratios of corresponding sides to find the length of BD. However, without additional information or a diagram, it is not possible to determine the length of BD.