Ramus height measurement on the right side of the panorex using the bisection method. Lines 1 and 2 are the tangents of the mandibular ramus and the body, respectively. Line 3 is the bisection line dividing the angle between the two tangents in half. Line 4 is used to measure the ramus height and goes from the gonial angle (where line 3 crosses the curvature of the angle of the mandible, i.e., point gonion) to the highest point on the top of the condyle, i.e., point condyle.