$\"\"$

\

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

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

\

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

\

Find the length of $\"\"$ .

\

Consider $\"\"$ and $\"\"$ .

\

$\"\"$

\

$\"\"$ .

\

Find the length of $\"\"$ .

\

Consider $\"\"$ and $\"\"$ .

\

$\"\"$

\

$\"\"$ .

\

Find the length of $\"\"$ .

\

Consider $\"\"$ and $\"\"$ .

\

$\"\"$

\

$\"\"$ .

\

Find $\"\"$ .

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$\"\"$

\

$\"\"$

\

$\"\"$ .

\

Therefore, the triangle is right angle triangle.

\

$\"\"$

\

The triangle is right angle triangle.