Find the distance from point A (1; 2; 3) to the origin

General formula for calculating the distance between two points:

d = ((x2 – x1) ^ 2 + (y2 – y1) ^ 2 + (z2 – z1) ^ 2) ^ 0.5.

Point A has coordinates (x2; y2; z2) = (1; 2; 3).

The origin has coordinates (x1; y1; z1) = (0; 0; 0).

Substitute into the formula:

d = ((1 – 0) ^ 2 + (2 – 0) ^ 2 + (3 – 0) ^ 2) ^ 0.5;

d = (1 + 4 + 9) ^ 0.5;

d = 14 ^ 0.5.