Explanation:
angle AEB = 180° - (25°+25°) (isosceles triangle)
= 180° - 50°
= 130°
angle AEB = angle CED = 130° (vertically opp angle)
angle ECD = 25° (alternate angle)
angle CDE = 180° - (25°+130°) (angle sum of a triangle)
= 180° - 155°
= 25°
not sure but here you go^^