WAEC - Mathematics (2023 - No. 44)
Find the value of m in the diagram above.
\(40^0\)
\(50^0\)
\(130^0\)
\(140^0\)
설명
∠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°