圆形建筑物圆心坐标和半径的测定

Measurement of Radius and Coordinate of the Centre of Circle for Circular Building

就如何绘制圆形建筑平面图形的问题 ,提出了四种测定圆形建筑物圆心坐标和半径的方法 ,即切线法、半径两点法、三点法和测角交会法 。

For how to draw the plane figure of a circular building, author puts forward four kinds of the measurement methods including tangent, radius two points, three points and angular intersection method, and derives the calculating formulae of four measurement methods.