How to find the distance between two points on a 3d plane?

  pythagorean theorem can be extended into three dimensions by creating a right triangle with two of its vertices lying in a horizontal plane. the result is the three-dimensional distance formula for 2 points.        x2 -x12 +y2 -y12+z2 -z1 2

A)26•2=52there are 2 sides with the same length116-52=64the other 2 side have to be half of 64 each64/2=32the width is 32b)make two sentences about these steps because your teacher knows how you write and explain things.