Kiểm tra 1 tiết
Chia sẻ bởi Nguyễn Thị Xuân Quyên |
Ngày 27/04/2019 |
140
Chia sẻ tài liệu: Kiểm tra 1 tiết thuộc Hình học 9
Nội dung tài liệu:
Họ và tên:.........................................................
Lớp: 9.........
KIỂM TRA CHƯƠNG I (45 PHÚT)
Môn: Hình học 9
ĐỀ BÀI (Đề 1)
Bài 1: ( 1đ). Vẽ hình và viết công thức tính đường cao theo hình chiếu của cạnh góc vuông đó trên cạnh huyền, theo hai cạnh góc vuông?
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Bài 2. (1đ). Vẽ hình và viết công thức tính cạnh góc vuông theo cạnh huyền và tỉ số lượng giác của góc nhọn?
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Bài 3. (1 đ). Cho tam giác ABC vuông tại A, có AB= 6cm, AC = 8cm, BC = 10cm. Tính tỉ số lượng giác của góc C?
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Bài 4. (2,5 đ)
Tìm x, y trong các hình vẽ sau:
a) b)
c)
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Bài 5: (1 điểm) Một khúc sông rộng 20m. Một chiếc thuyền qua sông bị dòng nước đẩy xiên nên phải chèo 26m mới sang được bờ bên kia. Hỏi dòng nước đã đẩy chiếc thuyền lệch đi một góc bao nhiêu? (góc làm tròn đến độ)
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Bài 6. (3,5 điểm)
Cho tam giác ABC vuông tại A, AB= 6cm, AC= 8cm. Từ B kẻ đường thẳng vuông góc BC, đường thẳng này cắt đường thẳng AC tại E.
1) Tính các cạnh của tam giác BCE.
2) Tính các góc nhọn BEC, và góc BCE (làm tròn đến độ).
3) Lấy điểm F nằm giữa B và E, kẻ BK CF (K CF). Chứng minh CEF và CKA đồng dạng.
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Lớp: 9.........
KIỂM TRA CHƯƠNG I (45 PHÚT)
Môn: Hình học 9
ĐỀ BÀI (Đề 1)
Bài 1: ( 1đ). Vẽ hình và viết công thức tính đường cao theo hình chiếu của cạnh góc vuông đó trên cạnh huyền, theo hai cạnh góc vuông?
..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
Bài 2. (1đ). Vẽ hình và viết công thức tính cạnh góc vuông theo cạnh huyền và tỉ số lượng giác của góc nhọn?
..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
Bài 3. (1 đ). Cho tam giác ABC vuông tại A, có AB= 6cm, AC = 8cm, BC = 10cm. Tính tỉ số lượng giác của góc C?
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Bài 4. (2,5 đ)
Tìm x, y trong các hình vẽ sau:
a) b)
c)
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Bài 5: (1 điểm) Một khúc sông rộng 20m. Một chiếc thuyền qua sông bị dòng nước đẩy xiên nên phải chèo 26m mới sang được bờ bên kia. Hỏi dòng nước đã đẩy chiếc thuyền lệch đi một góc bao nhiêu? (góc làm tròn đến độ)
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Bài 6. (3,5 điểm)
Cho tam giác ABC vuông tại A, AB= 6cm, AC= 8cm. Từ B kẻ đường thẳng vuông góc BC, đường thẳng này cắt đường thẳng AC tại E.
1) Tính các cạnh của tam giác BCE.
2) Tính các góc nhọn BEC, và góc BCE (làm tròn đến độ).
3) Lấy điểm F nằm giữa B và E, kẻ BK CF (K CF). Chứng minh CEF và CKA đồng dạng.
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