This is an MCQ-based quiz on **Three Dimensional Geometry.**

This includes Direction cosines, Direction Ratios, Equation of Line, Angle between two lines, and Shortest Distance

The direction cosines of the y-axis are

The coordinates of the midpoints of the line segment joining the points (2, 3, 4) and (8, -3, 8) are

The distance of the plane 2x – 3y + 6z + 7 = 0 from the point (2, -3, -1) is

The length of the ⊥er from the point (0, – 1, 3) to the plane 2x + y – 2z + 1 = 0 is

What is the distance (in units) between two planes: 3x + 5y + 7z = 3 and 9x + 15y + 21z = 9?

The reflection of the point (α, ß, γ) in the xy-plane is:

The planes 2x – y + 4z = 3 and 5x – 2.5y +10 z = 6 are

Perpendicular

Parallel

Intersect along y-axis

Passes through (0, 0, 5/4)

If a line makes angles α, β, γ with the axis then cos 2α + cos 2β + cos 2γ =

The line x = 1, y = 2 is

Parallel to x-axis

Parallel to y-axis

Parallel to z-axis

None of these