Given: ACDF is a rectangle. BDE is a triangle. BEF is an isosceles triangle.<br><br>In the figure, use the properties of the rectangle (all angles 90°, opposite sides equal and parallel) and the isosceles triangle BEF (two equal sides, two equal base angles).<br><br>Working through the angle relationships in the diagram:<br>∠DBF = 92°.<br><br>Final Answer: 92°