\

From the diagram the angles are .

In a triangle sum of angles are .

    (Remove the brackets) \ \

            (Add: )

                     (Add: ) \ \

\

  (Subtract 88 from each side)

\

              (Apply addiitve inverse propetry: )

\

                     (Apply addiitve identity propetry: )

                                 (Subtract: )

\

                             (Divide each side by 4)

\

                                  (Cancel common terms)

\

                                    (Divide: )

\

So, .

\

, , .

So, the angle measures are  .

\

The value of x is . The angle measures are  .

is an obtuse angle. So, the triangle is obtuse triangle.

\ \