To identify the side length that is opposite angle D, we need to know the context, such as the shape involved (e.g., triangle) and the measures of the other angles or sides. Without this information, I cannot determine which side length corresponds to angle D.
If this is a triangle question and you need to find the side opposite angle D, typically you would look at a diagram or have additional details about the triangle's dimensions.
If the triangle is labeled such that angle D is one of the angles and is opposite one of the sides, you might have to reference those labels.
Can you provide more information about the triangle or a diagram?