Step 1:

The vertices of triangle are $\"\"$ .

Distance between three dimensional points is $\"\"$

Find the lengths of the sides of the triangle by using above formula.

Find the length of $\"\"$ .

$\"\"$

Find the length of $\"\"$ .

$\"\"$

Find the length of $\"\"$ .

$\"\"$

Observe the two sides of the triangle are equal.

$\"\"$

Solution :

The triangle is isosceles triangle.