DE KIEM TRA 1 TIET HINH HOC 11B2
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<span class='text_page_counter'>(1)</span>TRƯỜNG THPT LẠNG GIANG SỐ 1. ĐỀ KIỂM TRA 1 TIẾT MÔN: HÌNH HỌC 11. Mã đề: 356 Họ tên:…………………………………………………………. Điểm. Lớp 11 A…… ĐỀ BÀI Câu hỏi Cho hình chóp S.ABCD có đáy ABCD là hình vuông cạnh a. Các tam giác SAB, tam giác SAD vuông tại A, SA = a a) Chứng minh: SA ^ (ABCD) b) Chứng minh: BC ^ (SAB) c) Chứng minh: SC ^ BD d) Tính góc giữa SB và (SAD) e) Gọi G1, G2 lần lượt là trọng tâm của các tam giác SBC, SCD. Chứng minh (SAC) là mặt phẳng trung trực của đoạn thẳng G1G2 . 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TRƯỜNG THPT LẠNG GIANG SỐ 1. ĐỀ KIỂM TRA 1 TIẾT MÔN: HÌNH HỌC 11. Mã đề: 678 Họ tên:…………………………………………………………. Điểm. Lớp 11 A…… ĐỀ BÀI Câu hỏi Cho hình chóp S.ABCD có đáy ABCD là hình vuông cạnh a, SA = a 3 và SA ( ABCD ) a) Chứng minh tam giác SAB và tam giác SAD là các tam giác vuông b) Chứng minh BD ( SAC ) c) Kẻ AK SD( K SD) . Chứng minh rằng AK CD d) Tính góc giữa SD và (SAB) e) Gọi G1, G2 lần lượt là trọng tâm của các tam giác SAB, SAD. Chứng minh (SAC) là mặt phẳng trung trực của đoạn thẳng G1G2 BÀI LÀM ......................................................................................................................................................................................................................................................... ......................................................................................................................................................................................................................................................... ......................................................................................................................................................................................................................................................... ......................................................................................................................................................................................................................................................... ......................................................................................................................................................................................................................................................... ......................................................................................................................................................................................................................................................... ..........................................................................................................................................................................................................................................................
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