Ha 1. On the clock face, a fixed end of the long needle is taken as the rotation center. When the long needle rotates 240 ° from 12 o'clock, the position of the long needle represents the time of? Minutes 2. If point a and point B are symmetrical about line Mn, and the distance between point a and Mn is 1.8 cm, then the length of line AB is? Cm 3. The triangle ABC moves 2cm along the line where the BC side is located to get the triangle a1b1c1. If the side length of BC is 6cm, then the length of segment BC1 is? Cm 4. The following four kinds of narration are wrong () (1) The direction of translation is the same, and the end position of translation is the same (2) If the distance of translation is the same, the end position of translation is the same (3) If the line m is perpendicular to the line AB, then points a and B are symmetric about the line (4) If the line m bisects the line segment AB, then points a and B are symmetric with respect to the line A. 1 B.2 C.3 D.4 5. Among the following four statements, the correct one is () (1) A rectangle is a centrosymmetric figure, and the center of symmetry is the focus of two diagonals (2) If the lines of the corresponding points of two graphs pass through a certain point and are bisected by this point, then the two graphs are centrosymmetric about this point (3) The midpoint of the line segment connecting two points on a centrosymmetric graph is the center of symmetry (4) Circles are centrosymmetric figures, so two circles are centrosymmetric figures A. 1 B.2 C.3 D.4

Ha 1. On the clock face, a fixed end of the long needle is taken as the rotation center. When the long needle rotates 240 ° from 12 o'clock, the position of the long needle represents the time of? Minutes 2. If point a and point B are symmetrical about line Mn, and the distance between point a and Mn is 1.8 cm, then the length of line AB is? Cm 3. The triangle ABC moves 2cm along the line where the BC side is located to get the triangle a1b1c1. If the side length of BC is 6cm, then the length of segment BC1 is? Cm 4. The following four kinds of narration are wrong () (1) The direction of translation is the same, and the end position of translation is the same (2) If the distance of translation is the same, the end position of translation is the same (3) If the line m is perpendicular to the line AB, then points a and B are symmetric about the line (4) If the line m bisects the line segment AB, then points a and B are symmetric with respect to the line A. 1 B.2 C.3 D.4 5. Among the following four statements, the correct one is () (1) A rectangle is a centrosymmetric figure, and the center of symmetry is the focus of two diagonals (2) If the lines of the corresponding points of two graphs pass through a certain point and are bisected by this point, then the two graphs are centrosymmetric about this point (3) The midpoint of the line segment connecting two points on a centrosymmetric graph is the center of symmetry (4) Circles are centrosymmetric figures, so two circles are centrosymmetric figures A. 1 B.2 C.3 D.4

one
12:40
two
3.6cm
three
8cm
4 D
5 B