Step 1: Recall the Angle Bisector Theorem

          NOTE: The Angle Bisector Theorem states that a point is on the bisector of an angle if and only if it is in the interior of the

         angle and is equidistant from the sides of the angle.

Step 2: Note down the given values

Step  3: Make sure that the given line (SU) is the bisector or not

            NOTE: A point is equidistant from two lines if it is the same distance from

          them. The distance between a point and a line is the length of the segment

          perpendicular to the line from the point.

            EXAMPLE: RU = TU = 70

Step 4: Conclude that the bisector bisects the angle into two equal parts

          EXAMPLE: \angle TSU = \angle RSU =  56 \degree