cho hình thang ABCD . Hai đương chéo AC và BD cắt nhau tai E . biết diên tích các hình tam giác ABE và ADE lần lượt là 5 cm2 và 15 cm2 . Tính diện tích hình thang ABCD?

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giai giup minh nha minh cho 5* II. WRITING Think about a natural disaster and write about its effects. Some suggestions: What is the definition of the disaster? What are the effects of the disaster (at least 2 effects)? How do people prepare for the disaster? (at least 2 ways of preparation) Your writing: ................................................................................................................................................................. ................................................................................................................................................................. ................................................................................................................................................................. ................................................................................................................................................................. ................................................................................................................................................................. ................................................................................................................................................................. ................................................................................................................................................................. ................................................................................................................................................................. ................................................................................................................................................................. ................................................................................................................................................................. ................................................................................................................................................................. .................................................................................................................................................................