∠EHI = ∠DEH = 40° (alternate angles are equal)∠BEH = 90° (given)∠BED = 90° - 40° = 50°∠BEF = 180° - 50° = 130° (sum of angles on a straight line is 180o)∠BEF = ∠ABE = 130° (alternate angles are equal)∴ m = 130°