(A). centre of curvature= intersection angle = (180 - B) = tangent lengths = long chord = tangential angle = mid-ordinate = radius angle = angle TOU= Provide the labels shown in the diagram as shown in Figure I AP external distance = (B). Why is the through chainage of the intersection point sometime accessible and other times not? AN (C). If the through chainage of a intersection point is 250m, what is the through chainage of the first tangent point T if the tangent length is 30m? EV straight Figure 2 8/2 R 8/2 0./2 U straight