Trêng thcs th¨ng b×nh

Bµi kiĨm tra 1 tiÕt
M«n : H×nh häc 7 - Ch¬ng I
Thêi gian: .... phót
Hä vµ tªn: Líp:7......………………………………………
§iĨm
Lêi phª cđa thÇy c« gi¸o
§Ị bµi:
I.Tr¾c nghiƯm:
Câu 1: Hai đường thẳng xx’ và yy’ cắt nhau tại O biết xÔy = 50
0
. Kết quả nào sau
đây là đúng?
A.x’Ôy’= 130
0
B. xÔy’=50
0
C.x’Ôy=50
0
D. x’Ôy’= 50
0

Câu 2: Phát biểu nào sau đây là đúng?
A. Hai góc vuông có chung đỉnh là hai góc đối đỉnh.
B. Hai đường thẳng cắt nhau thì vuông góc.
C. Qua một điểm vẽ được 2 đường thẳng vuông góc với một đường thẳng cho trước.
D. Hai đường thẳng là phân biệt khi chúng chỉ có 1 điểm chung
Câu 3: Nếu đường thẳng c cắt 2 đường thẳng a,b mà trong các góc tạo thành có:
A. Hai góc so le trong bằng nhau.
B. Hai góc đồng vò bù nhau.

145
0
b
Bµi lµm
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0
c. 90
0
d. 50
0
Cõu 2: Chn cõu sai.
a. gúc ngoi ca tam giỏc bng tng hai gúc trong khụng k vi nú.
b. trong tam giỏc cõn hai gúc ỏy bng nhau.
c. trong tam giỏc vuụng hai gúc nhn bng nhau.
d. trong tam giỏc u mi gúc bng 60
0
.
Cõu 3: Chn cõu sai.
a. tam giỏc cú hai cnh bng nhau l tam giỏc cõn.
b. tam giỏc cú ba cnh bng nhau l tam giỏc u.
c. tam giỏc u l tam giỏc cõn.
d. tam giỏc cõn l tam giỏc u.
Cõu 4: Chn cõu ỳng.
a. nu 2 cnh v mt gúc ca tam giỏc ny bng hai cnh v mt gúc ca tam
giỏc kia thỡ hai tam giỏc ú bng nhau.
b. nu mt cnh v hai gúc ca tam giỏc ny bng mt cnh v hai gúc ca
tam giỏc kia thỡ hai tam giỏc ú bng nhau.
c. nu cnh huyn v gúc nhn ca tam giỏc vuụng ny bng cnh huyn v
gúc nhn ca tam giỏc vuụng kia thỡ hai tam giỏc vuụng ú bng nhau.
d. nu cnh gúc vuụng v gúc nhn ca tam giỏc vuụng ny bng cnh gúc
vuụng v gúc nhn ca tam giỏc vuụng kia thỡ hai tam giỏc vuụng ú bng
nhau.
Cõu 5: Tam giỏc no cú 3 cnh nh sau l tam giỏc vuụng?
a. 2cm;4cm;6cm;
b. 4cm;6cm;8cm;

·
ABM = ACN
?
b. Gọi I là giao điểm của BM và CN. Chứng minh tam giác IBC cân?
c. Chứng minh AI là phân giác của góc A?
d. Chứng minh AI vuông góc với BC?
Bµi lµm
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;


C
3
=133
0
.
Hãy điền số đo thích hợp vào chỗ trống:

A
1
=

A
2
=

A
3
=

A
4
=

A
6
=


1
4
3
2
1
6
5
4
3
2
1
b
a
B
A
C