Điểm
Trường THP…………
Họ tên: ...........................................
Lớp: 12…...
KIỂM TRA HÌNH HỌC
Thời gian: 45 phút
:
Đề lẻ
Câu 1: Cho hình chóp đều S. ABC, đáy ABC cạnh a, mặt bên tạo với đáy góc α ( 00 < α < 900 ).
a) Tính thể tích S.ABC
b) Tính khoảng cách d(A, (SBC))
Câu 2: Cho lăng trụ đứng ABC. A'B'C', đáy ABC là tam giác vuông tai A; AB= a, BC= a 5 . Gọi K
là hình chiếu của B lên B'C. Góc giữa BK và mp (B'AC) bằng 300. Tính VABC.A'B'C'
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