抄録
We have conducted to develop the computer assisted instruction system which provides an e-Learning environment for drawing practice. In this study, a simple method to check on dimension lines missing in technical drawings and that to give learners feedback on evaluation was discussed. The data strings, corresponded to the width, height and depth direction, were made to describe vertex coordinates of the shape. The validity of dimensional information given on drawings was evaluated based on the trajectories between vertexes using dimension lines. This method dose not required correct drawings so that one can do the learning without the help of teachers. The prototype system was developed and examples of execution were demonstrated.
