class 11 three dimensional geometry introduction

The coordinates of a point are (3,0,0), the point lies on

• (A). x - axis

• (b). y - axis

• (C). z - axis

• (D). none of these

The point ( -1 , 2 , -3 ) lies in the :

• (A). 7th Octant

• (B). 5th Octant

• (C). 6th Octant

• (D). 8th Octant

A point is in the XZ-plane. Then its y-coordinate is

• negative

• positive

• 0

• can't say

The x-axis and y-axis taken together determine a plane known as

• XY-plane

• YZ-plane

• XZ-plane

• XYZ-plane

The coordinates of a point are (0,-1,0), the point lies on

• x-axis

• y-axis

• z-axis

• none of these

The coordinates of a point are (-2,0,3), the point lies on

• XY-plane

• YZ-plane

• XZ-plane

• Y-axis

Any point on YZ-plane will be of the form

• (y,z,0)

• (0,y,z)

• (y,0,z)

• (x,0,0)

The XY-plane ,YZ-plane and XZ-plane are

• parallel to each other

• mutually perpendicular to each other

• only two planes are perpendicular

• none of above