Chương I. §3. Bảng lượng giác
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Nguồn:
Người gửi: nguyễn thị thảo
Ngày gửi: 09h:11' 12-07-2019
Dung lượng: 61.9 KB
Số lượt tải: 16
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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