Question

The distance of a point P(a, b, c) from x-axis is ______.

Options

• `sqrt("a"^2 + "c"^2)`

• `sqrt("a"^2 + "b"^2)`

• `sqrt("b"^2 + "c"^2)`

• b² + c² 

Answer 1

The distance of a point P(a, b, c) from x-axis is `sqrt("a"^2 + "b"^2)`.

Explanation:

The required distance is the distance of P(a, b, c) from Q(a, o, o), which is `sqrt("b"^2 + "c"^2)`.