Kiểm tra một tiết lớp: 7 môn: Hình học

Trường THCS Xuân áng Kiểm tra một tiết
Lớp: 7____ Môn: Hình học
Họ và tên:______________________
 Điểm
 Lời phê của thầy (cô) giáo
Đề bài.
Câu 1 (2đ): Điền dấu x vào ô trống mà em chọn.
Câu
Nội dung
Đúng
Sai
1
Hai đường thẳng phân biệt cùng vuông góc với đường thẳng thứ 3 thì song song nhau.
2
Hai đường thẳng song song là 2 đường thẳng phân biệt không cắt nhau.
3
Hai đường thẳng cắt nhau thì vuông góc
4
Nếu 2 đường thẳng a,b cắt đường thẳng c mà trong các góc tạo thành có một cặp góc trong cùng phía bù nhau thì a//b.
a
b
c
Câu 2 (4đ): 
Phát biểu các định lí được diễn tả bởi hình vẽ sau:
Viết GT,KL các định lí trên.
Câu 3 (4đ): 
450
A
B
a
b
O
300
Cho hình vẽ. Biết a//b, Â = 300, . Tính số đo của góc AOB? Nêu rõ tại sao tính được như vậy.
Bài làm
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