| 摘要 |
<p>The present invention relates to a two circle magnet protractor which uses a two circle protractor to more easily measure an angle or draw a figure. The two circle magnet protractor comprises: an outer side circle protractor having a stepped groove which has a horizontal surface portion wherein a circle upper end side groove and a steel wire groove are formed in an inner surface side; and an inner side circle protractor inserted into the circle upper end side groove of the outer side circle protractor to be mounted to rotate a full 360 degrees, and having a circle border portion and a straight line ruler portion formed to cross a gap of an inner side of the circle border portion. A student or the like can freely draw figures such as a straight line, an angle line, and a figure, and carrying without loss. As there is not a sharp edge portion, injuries wherein a hand is stuck in a bag can be prevented.</p> |
