Cho tam giác ABC vuông tại A (AC<AB), đường cao AH, kẻ BF vuông góc đườn trung tuyến AM tại E, đường thẳng BE cắt AH tạo D, cắt AC tại F. a) CMinh BE.BF = BH.BC b) CMinh AB^2/AC^2 = BH/CH c) CMinh B là trung điểm của BF d) Cho BC= 20, AH=9,6. Tính DE, AF *GIÚP MK VS Ạ*

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I think you should buy _____  pack of mineral water instead. And you can also buy _____  snacks such as potato crisps, 3 kilos of mandarins, 2 kilos of apples, 3 bunches of bananas, ______  cookies and soft candies.

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We should decorate our living room with _____ orange banner. We also need ________  ribbons, balloons, party hats and costume.

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I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.