Bài 9 tiet 10

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:
?
Câu 2 (2 điểm): Tìm x biết:

Câu 3 (3 điểm): Với
và
;
thì:

.
Câu 4 (3,5 điểm):
Cho hình thang ABCD có AB//CD,
;
;
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:
.
b. Tính diện tích xung quanh hình thang ABCD?
BÀI LÀM PHẦN TỰ LUẬN

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