UBND HUYỆN VỊ XUYÊN
TRƯỜNG THCS KIM LINH
KIỂM TRA GIỮA HỌC KỲ I NĂM HỌC 2020 - 2021
Môn: Toán - Lớp: 9
Thời gian: 90 phút
Họ và tên:.........................................................
Lớp:...................................................................
Điểm bằng số
Điểm bằng chữ
Nhận xét
Giám khảo:
Giám khảo số 1:...................
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Giám khảo số 2:...................
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Đề bài
I, Trắc nghiệm (2,0 điểm): Khoanh tròn vào đáp án câu trả lời đúng:
Câu 1. Kết quả của phép tính là:
A. 676. B. – 26. C. 26. D. .
Câu 2. Kết quả của phép tính là:
A. . B. – 4. C. 16. D. 4.
Câu 3. Sin450 bằng:
A.
B.
C.
D.
Câu 4. Trong tam giác vuông, mỗi cạnh góc vuông bằng cạnh góc vuông kia nhân với:
A. Sin góc đối hoặc cosin góc kề. B. Tan góc đối hoặc cot góc kề .
C. Tan góc đối hoặc cosin góc kề. D. Tan góc đối hoặc sin góc kề.
II, Tự luận (8,0 điểm):
Câu 1. ( 2,0 điểm) Thực hiện các phép tính:
Câu 2. (3,0 điểm) Cho biểu thức:
a, Tìm điều kiện để P xác định.
b, Rút gọn P.
c, Cho x = 81, tính P.
Câu 3.(3,0 điểm) Cho ABC vuông ở A có AB = 3 cm, AC = 4 cm, đư ờng cao AH.
a, Tính BC, AH.
b, Tính góc B, góc C.
Bài làm:
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nguon VI OLET
