Đề kiểm tra 45 phút Hình học 10 - Chương 1 - Đề 2

<span class='text_page_counter'>(1)</span>Trường THPT Nguyễn Việt Khái Lớp: 10 Họ và tên: ............................................... Điểm. Thứ ngày tháng 11 năm 2010 BÀI KIỂM TRA MÔN TOÁN (HÌNH HỌC) Thời gian: 45 phút Lời phê của giáo viên. I-TRAÉC NGHIEÄM: (2 điểm) Hãy khoanh tròn vào câu trả lời thích hợp. Câu1: Nếu  I là trung điểm của ABthì:      A. AI  IB B. IA  IB C. AI   IB D. IA   BI Câu 2: Cho 3 điểm phân biệt A, B, C. Đẳng thức nào sau đây là sai ?             A. AB  BC  AC B. AB  AC  CB C. AB  AC  BC D. BA  CB  CA Caâu 3: Cho ABC có trọng tâm G, I là trung điểm của AB. Đẳng thức nào sau đây là đúng ?          1  A. IG   IC B. GB  GC  2GI C. GA  GB  2GI D. GC  2GI 3     Câu 4: Cho 4 điểm A, B, C, D. Ta có AB  BC  CD  DA bằng:     A. BA B. DC C. AD D. 0 II-TỰ LUẬN: (8 điểm) Câu 1: Cho hình bình hành ABCD có tâm I. Hãy thực hiện các phép toán sau:.    .   . a) IA  IB  IC  ID = ? b) AB  AD  AC = ? Caâu 2: Cho hình hình bình haø nh ABCD.    a) Chứng minh rằng: AD  BC  AC  BD.    . b) Với M tùy ý, chứng minh rằng: MA  MC  MB  MD Caâu 3: Trong maët phaúng Oxy cho tam giaùc ABC coù A(1; 3), B(–7; 1), C(3;–1). a) Tìm tọa độ trung điểm I của đoạn thẳng AB. b) Tìm tọa độ trọng tâm G của tam giác ABC. c) Tìm tọa độ điểm D sao cho tứ giác ABCD là hình bình hành. Bài làm. Lop10.com.

<span class='text_page_counter'>(2)</span> Lop10.com.

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Câu 2: Cho B, C, D. 4 điểm  A,  Chứng minh rằng: a) AB  CD  AD  BC.     b) AC  DB  AD  CB. ......................................................................................................................................................... ......................................................................................................................................................... ......................................................................................................................................................... ......................................................................................................................................................... ......................................................................................................................................................... ......................................................................................................................................................... ......................................................................................................................................................... ......................................................................................................................................................... ......................................................................................................................................................... ......................................................................................................................................................... ......................................................................................................................................................... ......................................................................................................................................................... ......................................................................................................................................................... ......................................................................................................................................................... ......................................................................................................................................................... Câu 3: Cho hình chữ nhật ABCD..      . a) Với M là điểm tùy ý, chứng minh rằng: MA  MC  MB  MD.  . b) Chứng minh rằng:  AB  AD  =  AB  AD . ......................................................................................................................................................... ......................................................................................................................................................... ......................................................................................................................................................... ......................................................................................................................................................... ......................................................................................................................................................... Lop10.com.

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