thi lớp 9 rùi huhu Cho ∆ABC vuông tại A, biết biết góc B = 60 độ ; AB = 10cm, đường cao AH (H phụ thuộc BC) a) Tính AH; HC b) Gọi D là chân đường vuông góc kẻ từ H đến AC (D phụ thuộc AC). Chứng minh $HD^{2}$ $= DA.DC$

Choose the best answer.

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.

Choose the best answer.

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

Choose the best answer.

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