Trờng thcs thăng bình
Bài kiểm tra 15 phút
Môn : Toán 9 - Chơng I
Thời gian: .... phút
Họ và tên:Lớp:9......
Điểm
Lời phê của thầy cô giáo
Đề bài:
I.Trắc nghiệm:
Câu1 (4đ): Điền đúng Đ hoặc sai S vào ô trống trong các câu sau:
A. Sin A =
a
b
B. cotg C =
a
c
C. cos C = Sin (
0
90 - A )
D. tg A = cotgC.
II.Tự luận:
Câu 2(4đ). Tìm x, y trên hình vẽ sau:
Câu 3 (2đ). Không dùng bảng lợng giác và MTBT.
Hãy so sánh tg
0
32
và cos
0
58
.
Bµi lµm
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Trờng thcs thăng bình
Bài kiểm tra 1 tiết
Môn : Toán 9 - Chơng I
Thời gian: .... phút
Họ và tên:Lớp:9......
Điểm
Lời phê của thầy cô giáo
Đề bài:
I.Trắc nghiệm:
Câu 1(2đ). Trong hình vẽ sau đây, hệ thức nào đúng?
A. sin N =
m
n
; B. cos N =
p
m
;
C. tg N =
n
p
; D. cotg N =
m
p
.
II.Tự luận:
Câu 2( 3đ). Không dùng MTBT . Hãy sắp xếp các tỉ số lợng giác của các góc sau
đây từ nhỏ đến lớn:
tg
0
25
, cotg
0
30
, tg
0
65
, cotg
0
70
, tg
0
41
, cotg
0
76
Câu 3( 4đ). Cho hình vẽ. Biết AH = 4 ; HC = 5.
a, Tính: BH, AB.
b, Tính góc A, góc C ( làm tròn đến độ ).
C©u 4 (1®). BiÕt cos α =
1
5
. T×m sin α , cotg α .
Bµi lµm
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Trờng thcs thăng bình
Bài kiểm tra 15 phút
Môn : Toán 9 - Chơng III
Thời gian: .... phút
Họ và tên:Lớp:9......
Điểm
Lời phê của thầy cô giáo
Đề bài:
I.Trắc nghiệm:
Câu 1(3đ). Điền vào chỗ chấm để có mệnh đề đúng:
1, Trong một đờng tròn, đờng kính vuông góc với một dây thì .
2, Góc .có số đo bằng nửa hiệu số đo của hai cung bị chắn.
3, Góc nội tiếp .có số đo bằng
0
90
.
Câu 2(3đ). Điền đúng-Đ hoặc sai-S vào các mệnh đề sau:
1, Trong một đờng tròn, hai cung bằng nhau thì có số đo bằng nhau.
2, Trong một đờng tròn, các góc nội tiếp bằng nhau thì cùng chắn một cung.
3, Số đo góc nội tiếp có số đo bằng nửa số đo góc ở tâm cùng chắn một cung.
II.Tự luận:
Câu 3(4đ).
Cho tam giác ABC có góc B >
0
90
. Kẻ đờng cao AH, CK cắt nhau tại M. CMR
Tứ giác BHMK nội tiếp. Xác định tâm đờng tròn đó.
Bài làm