[r]
(1)A. a
IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I
B b
Với cách vẽ đó, giải thích sao a//b ?
Vẽ đường thẳng song song êke ( hình 7)
Hnh B¸u - THCS Lê Quý Đôn Duy Xuyên -0bacodon@yahoo.com 2008
(2)A.
a
IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
B b
Vẽ đường thẳng song song êke ( hình 7)
Huỳnh Báu - THCS Lê Quý Đôn Duy Xuyên -0bacodon@yahoo.com 2008
(3)? .
IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII40 b
0 . 400 a A. B IIIIII IIIIII IIIIII IIIIII IIIIII IIIIII IIIIII IIIIII IIIIII IIIIII IIIIII IIIIII IIIIII IIIIII IIIIII IIIIII IIIIII IIIIII IIIIIIII 90 60 30 0 120 15 0 18 0 III III III III III III III III III III III III III III III III III III III III III III III III III III 900 600 300 0 1200 150 180 IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
Vẽ đường thẳng song song thước đo gúc ( hỡnh 7)
Huỳnh Báu - THCS Lê Quý Đôn Duy Xuyên -0bacodon@yahoo.com 2008