To find the distance between two 3d points, square the difference of the x, y, and z points. Then, sum them and take the square root.
Distance=√(x2−x1)^2+(y2−y1)^2+(z2−z1)^2
Replace x^1,x^2,y^1,y^2,z^1, and z^2 with the corresponding values.
Distance=√((5)−(7))^2+((2)−(2))^2+((9)−(4))^2
Simplify √((5)−(7))^2+((2)−(2))^2+((9)−(4))^2
calculator....
Distance= √29
The distance between (7,2,4) and (5,2,9) is √29.
√29≈5.38516481
