Question
The figure shows a piece of square paper BCDE folded at two of its corners B and D. ∠BFE is 4 times as large as ∠BEF and ∠DEG is 10° smaller than ∠BEF. Find ∠BED.
4 m

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The figure shows a piece of square paper BCDE folded at two of its corners B and D. ∠BFE is 4 times as large as ∠BEF and ∠DEG is 10° smaller than ∠BEF. Find ∠BED.