Kiểm tra 45 phút môn: Hình học khối 9

Họ và tờn:.........................................................
Lớp: 9.........
KIỂM TRA 45 PHÚT
Mụn: Hỡnh học 9
Điểm
Nhận xột của giỏo viờn
Đề BàI
Bài 1 : (1,5 điểm)
	Cho tam giác ABC vuông tại A, kẻ đường cao AH, biết BH = 4, CH = 5. 
Tính độ dài các đoạn AB, AC, AH.
Bài 2 : (3,5 điểm)
	a) Sắp xếp các tỉ số lượng giác sau theo thứ tự tăng dần
	sin240 , cos350 , sin540 , cos700 , sin780 
	b) Giải tam giác ABC vuông tại A biết BC = 10cm ; = 600
Bài 3 : (3,5 điểm)
	Cho tam giác nhọn ABC, kẻ đường cao AH. Từ H kẻ HE vuông góc AB (E thuộc AB), kẻ HF vuông góc AC (F thuộc AC)
	a) Chứng minh rằng : AE . AB = AF . AC
	b) Cho AB = 3cm ; AH = 4cm. Tính AE, BE
	c) Cho = 300. Tính FC
Bài 4 : (1,5 điểm)
	Một cột cờ cao 7m có bóng trên mặt đất dài 4m. Tính góc a mà tia sáng mặt trời tạo với mặt đất (làm tròn đến phút)
BÀI LÀM
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