Find the value of m in the diagram above.
...
Find the value of m in the diagram above.
A.
400
B.
500
C.
1300
D.
1400
Correct answer is C
∠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°
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