Đề kiểm tra 15 phút môn Hình học lớp 6 - THCS Vĩnh Bình

Câu 2.Trên cùng một nửa mặt phẳng bờ chứa tia Ox , vẽ tia Ot , Oy sao cho
góc xOt = 300 , góc xOy = 600 . ( hình vẽ 1đ)
a) Tia Ot có nằm giữa 2 tia Ox , Oy không ? Vì sao ? ( 1đ)
b) So sánh góc tOy và góc xOt . ( 1,5đ)
c) Tia Ot có là tia phân giác của góc xOy không ? vì sao ? ( 1,5đ)
Câu 3 . Vẽ 2 góc kề bù xOy và góc yOx’ , biết góc xOy = 1400 .
Gọi Ot là tia phân giác của góc xOy .
a ) Tính góc x’Oy
b ) Tính góc xOt
c) Tính x’Ôt .
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TRƯỜNG THCS VĨNH BÌNH
LỚP:
HỌ VÀ TÊN :
 ĐỀ KIỂM TRA 15 PHÚT ĐS 7 
ĐIỂM 
LỜI PHÊ 
Câu 1 ) Tính giá trị của biểu thức 7m2 + 2n - 6 tại m = -1 và n = 2 . ( 2đ) 
Câu 2 ) Cho đơn thức sau : -3x2y4 x t 
 a) Thu gọn đơn thức trên ( 1đ) . Tìm bậc của đơn thức thu gọn ( 1đ)
 b) Hãy cho biết phần hệ số và phần biến của đơn thức thu gọn . (1đ) 
Câu 3 ) Tính
 a) (x2t ) . 7 x2y (2đ)
 b) 2 x2y + ( -3x2y) (2đ) 
Câu 4) Điền vào chỗ trống : (1đ) 
 .......... + ........ + ........ = x5 
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