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Chương I. §3. Bảng lượng giác

Tham khảo cùng nội dung: Bài giảng, Giáo án, E-learning, Bài mẫu, Sách giáo khoa, ...
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Nhắn tin cho tác giả
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Người gửi: nguyễn thị thảo
Ngày gửi: 09h:11' 12-07-2019
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Số lượt thích: 1 người (nguyễn thị thảo)

BÀI TẬP TRỌNG TÂM
Bài 1:Cho tam giác ABCvuôngtại A, AH làđườngcao. Biết AB = 6, AC = 8. Tìm BH, HC


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Bài 7: Cho tam giác ABC vuông tại A, AH là đường cao. AH = 12, BH = 16. Tính các cạnh của tam giác.

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AH = 6,2; BH = 5;BC = 12,8

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Bài 10:Cho tam giác ABC vuông tại A, BC = 12cm. Tính chiều dài các cạnh của tam giác biết  .
 ; 

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AC = 30,
BC = 60cm

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Bài 13:Cho tam giác ABC vuôngtại A, biết BC = 5cm, /C = 300. Tìm các cạnh của tam giác.

AB = 2,5cm.
AC = 

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Bài 24:Cho hìnhchữnhật ABCD. Từ D hạđườngvuônggócvới AC, cắt AC ở H. Biếtrằng AB = 13cm; DH = 5cm. Tínhđộdài BD.

BD = 14,08cm

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Bài 25: Cho hình thang cân ABCD có đáy lớn AB = 30cm, CD = 10cm. Góc A = 600
Tính BC
Gọi M, N là trung điểm của AB, CD. Tính MN.


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