The degree of EFD angle can be obtained from the degree of EFB angle, so the degree of EFD angle is also the degree of EFD angle, and then the degree of BFD angle can be obtained. Because the sum of the internal angles of the quadrilateral is 360, and in the quadrilateral GCDF, angle C and angle D are right angles, the degree of angle CGF can be found. Because the vertex angles are equal, the degree of EGB angle is the degree of CGF angle. The final figure is 64.