Krishna
0

Step 1: Recall all the theorems of the circle.

            LINK: http://jwilson.coe.uga.edu/emt725/ReviewCir/ReviewCir.htm


Step 2: Note down given values and examine the figure


Step 3: Identify the suitable theorem for the given question.

          NOTE: An angle inscribed in a semicircle is always a right angle.

                EXAMPLE: In triangle ABC \angle C=90\degree

Step 4:Use the theorem to find the unknown value.

            NOTE: The sum of the three interior angles is equal to 180.

              EXAMPLE: From triangle ABC

                                    \angle A+\angle B+\angle C=180\degree

                                     46\degree + \angle B + 90\degree = 180

                                    \angle B=180\degree-136\degree

                                     \angle B = 34\degree