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[数学] 请高手帮忙啦

请高手帮忙啦

请哪位高手帮忙解题,没有答案。 4ABCD is a quadrilateral.rar (6.61 KB) .

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回复 1#哈哈爸 的帖子

My son did it, and I have not yet verified:

756.

Clue: to extend AB and DE to meet at F..

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W e  too.

Clue 2:  extend DA and CB to meet  at H
.

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回复 3#GerryBB 的帖子

EEEEEEExcellent ! Simpler and clearer solution ! .

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GOOD WORK. THANKS LOT..

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