已知点(2,1),则它关于原点的对称点坐标为()
A: (1,2)
B: (2,-1)
C: (-2,1)
D: (-2,-1)
A: (1,2)
B: (2,-1)
C: (-2,1)
D: (-2,-1)
D
举一反三
- 在直角坐标系中,点(1,2,-1)关于原点的对称点坐标为( ) A: (1,2,1) B: (-1,-2,1) C: (-1,-2,-1) D: (1,-2,1)
- 点A(-2,1,4),点A关于原点对称点坐标是: A: (1,-2,-4) B: (-2,1,-4) C: (2,-1,-4) D: (2,1,-4)
- 点(2,1)关于直线y=x的对称点的坐标为() A: (-1,2) B: (1,2) C: (-1,-2) D: (1,-2)
- 点\( P(2, - 1,3) \) 关于 \( xOy \)坐标面,关于\( x \) 轴,关于原点的对称点分别为( ). A: \( (2, - 1, - 3),(2,1, - 3),( - 2,1, - 3) \) B: \( ( - 2, - 1, - 3),(2, - 1, - 3),( - 2,1, - 3) \) C: \( (2, - 1, - 3),( - 2,1, - 3),( - 2, - 1, - 3) \) D: \( ( - 2, - 1, - 3),( - 2,1, - 3),(2, - 1, - 3) \)
- 点M(﹣2,1)关于y轴的对称点N的坐标是() A: (2,1) B: (1,﹣2) C: (﹣2,﹣1) D: (2,﹣1)
内容
- 0
点(-1,2)关于原点的对称点坐标是() A: (-1,-2) B: (1,-2) C: (1,2) D: (2,-1)
- 1
点(1,-2)关于原点的对称点的坐标是() A: (1,2) B: (-1,2) C: (-1,-2) D: (1,-2)
- 2
点M(3,-2,1)关于坐标原点的对称点是( ) A: (-3,2,-1) B: (-3,-2,-1) C: (3,-2,-1) D: (-3,2,1)
- 3
点M(3,-2,1)关于坐标原点的对称点是( ) A: (-3,2,-1) B: (-3,-2,-1) C: (3,-2,-1) D: (-3,2,1)
- 4
点M(3,-2,1)关于坐标原点的对称点是( ) A: (-3,2,-1) B: (-3,-2,-1) C: (3,-2,-1) D: (-3,2,1)