Kiểm tra 1 tiết (chương III) môn: Toán (Hình học 7)

Trường: THCS Vọng Thê
Họ&tên:...........
Lớp: 7A.
 KIỂM TRA 1 TIẾT ( CHƯƠNG III )
 Môn : TỐN (Hình Học 7)
 Thời gian : 45 phút 
 (Không kể thời gian phát đề)
Điểm
Lời phê của giáo viên
TỰ LUẬN: (10.0 điểm)	
Câu 1: (1,0 điểm)
Cho tam giác ABC. Biết . Hãy so sánh các gĩc của tam giác ?
Câu 2: (3,0 điểm) Hãy kiểm tra xem bộ ba đoạn thẳng cĩ độ dài như sau cĩ phải là ba cạnh của tam giác hay khơng?
2cm; 5cm; 6cm.
7cm; 8cm; 18cm.
3cm; 4cm; 7cm.
Câu 3: (6,0 điểm) 
Cho tam giáccân tại với là đường phân giác.
Chứng minh: .
Chứng minh: là đường trung tuyến của 
Gọi là trọng tâm của Tính Biết 
Chứng minh: là tam giác vuơng tại 
 (Vẽ hình 1,0 điểm)
Bài làm:
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 Hồ Thị Cúc	 Nguyễn Bin