Bài kiểm tra giữa kỳ I_Toán 9_2010-2011

PHÒNG GD&ĐT THÀNH PHỐ SƠN LA
TRƯỜNG THCS CHIỀNG CƠI
Họ và tên: …………………………………………………………………….. Lớp 9 ……………
Họ tên, chữ ký giáo viên coi kiểm tra số 1:
…………………………………………………………………………….
Họ tên, chữ ký giáo viên chấm kiểm tra số 1:
…………………………………………………………………………….
Họ tên, chữ ký giáo viên coi kiểm tra số 2 :
…………………………………………………………………………….
Họ tên, chữ ký giáo viên chấm kiểm tra số 2:
…………………………………………………………………………….
BÀI KIỂM TRA GIỮA KỲ I - NĂM HỌC 2020-1011
Môn: Toán lớp 9
Thời gian: 45 phút (Không kể thời gian giao đề)
Điểm Lời phê của giáo viên
(Học sinh làm bài trực tiếp vào đề kiểm tra này)
ĐỀ BÀI
Câu 1 (1,5 điểm): Nêu quy tắc chia hai căn bậc hai? Áp dụng tính:
68
153
?
Câu 2 (2 điểm): Tìm x biết:
2
9 12x 4x 4− + =
Câu 3 (3 điểm): Với
x 0>
và x 1≠ ; x 4≠ thì:
1 1 x 1 x 2 x 2
:
x 1 x x 2 x 1 3 x
 

+ + −
 
− − =
 ÷
 ÷
− − −
 
 
.
Câu 4 (3,5 điểm):
Cho hình thang ABCD có AB//CD,
µ
µ
0
A D 90= =
;
AB 9cm=
;
CD 16cm=
và
hai đường chéo vuông góc với nhau tại O. Từ A kẻ đường thẳng DB cắt đường thẳng
DC tại E.
a. Chứng minh:
2
AD AB.DC=
.
b. Tính diện tích xung quanh hình thang ABCD?
BÀI LÀM PHẦN TỰ LUẬN
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