Kiểm tra 1 tiết (chương I) môn: Toán (hình học 8)

Tröôøng: THCS Voïng Thê
Hoï&teân:...........
Lôùp: 8A1
 KIEÅM TRA 1 TIEÁT ( CHÖÔNG I )
 Moân : TOÁN (Hình Học 8)
 Thôøi gian : 45 phuùt 
 (Khoâng keå thôøi gian phaùt ñeà)
Ñieåm
Lôøi pheâ cuûa giaùo vieân
TỰ LUẬN: (10.0 điểm)	
 (2,0đ) Cho hình vẽ sau (BC=6cm):
a) Chứng minh là đường trung bình của .	
b) Tính độ dài đoạn .
2) (2,0đ) Cho vuông tại . Gọi lần lượt là trung điểm của , là điểm đối xứng với qua . Chứng minh rằng điểm đối xứng với điểm qua 
3) (2,0đ) Cho , D, E lần lượt là trung điểm của AB, AC. Chứng minh là hình thang.
4) (4,0đ) Cho hình vẽ sau:
a) Chứng minh tứ giác là hình bình hành.
b) Các đường chéo của tứ giác có điều kiện gì thì là hình thoi?
Bài làm:
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	Duyệt của TTCM	 GVBM
 Hồ Thị Cúc	 Nguyễn Bin