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2 tháng 1 2017
Diện tích thửa đất là:
20 x 24 : 2 = 240 (m2)
Hai tam ANB và ACB có chung cạnh đáy AB nên diện tích chúng tỉ lệ với đường cao.
Diện tích tam giác ABN là:
240 : 20 x 15 = 180 (m2)
Diện tích tam giác NBC là:
240 – 180 = 60 (m2)
Chiều cao kẻ từ N là: (MB)
60 x 2 : 20 = 6 (m)
Chiều cao còn lại của thửa đất là : (AM)
24 – 6 = 18 (m)
Diện tích còn lại của thửa đất là :
15 x 18 : 2 = 135 (m2)
Đáp số : 135m2.
12 tháng 1 2016
Chiều cao hình tam giác là:
48x2:6=16(cm)
Diện tích hình tam giác là:
16x24=384(cm2)
Đáp số:384cm2
15 tháng 12 2018
Bài làm
co hinh tam giac co 3 goc nhon : Đ
co hinh tam giac co 3 goc tu : S
co hinh tam giac co 1 goc tu va 2 goc nhon: Đ
co hinh tam giac co 1 goc nhon va 2 goc tu : S
co hinh tam giac co 1 goc vuong va 2 goc nhon : Đ
co hinh tam giac co 1 goc vuong va 2 goc tu : S
# Chúc bạn học tốt #
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không phải dạng vừa đâu