kiểm tra 1tiet hinh6 ki 2

Hoï vaø teân :………………………………………………………………………………………..          Bài kiểm tra

Lôùp :6 Moân :                               Thôøi gian : 45 ph

ĐỀ BÀI

I. Trắc Nghiệm:

Câu 1: (1,5 điểm). Em hãy khoanh tròn chữ cái đứng trước câu trả lời đúng.

1/ Cho biết A và B là hai góc phụ nhau. Nếu góc A có số đo là 550 thì góc B có số đo là:

 A.  B.  C.  D.

2/ Cho và là hai góc kề bù và thì số đo bằng:

 A.  B.  C.  D.

3/ Ot là tia phân giác của góc xOy khi:

 A.  B.  C.  D.

Câu 2: (1,5 điểm). Đánh dấu “x” vào ô đúng, sai thích hợp.

II.Tự luận: (7 điểm)

Câu 3 : ( 3 điểm )

a) Vẽ góc xOy có số đo 1200 .

b) Vẽ tia Oz là tia phân giác của góc xOy ở câu a .

c) Tính số đo góc xOz .

Câu 4: (4 điểm). Cho hai tia Oy, Oz cùng nằm trên một nửa mặt phẳng bờ chứa tia Ox. Biết , .

a)   Tia Oy có nằm giữa hai tia Ox, Oz không? Vì sao?

b)  So sánh góc xOy và góc yOz.

c)   Tia Oy có phải là tia phân giác của góc xOz không? Vì sao?

d)  Vẽ tia phân giác Om của . Vẽ tia phân giác On của góc . Tính .

Bµi lµm

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