Novel protractor

The utility model discloses a novel protractor, including the protractor main part, the surface engraving of protractor main part has inverse time registration and up time registration, the lower extreme of protractor main part is provided with the apex angle and takes aim at sight, the top that sight was taken aim at to the apex angle is provided with the angle of rotation axle, the gomphosis ofangle of rotation axle has angle indication pole mobile jib, the reading window has been seted up on the surface of angle indication pole mobile jib, the upper end of reading window is provided with fastening screw, the fastening screw bolt has length adjusting rod, in actual conditions, when the angle of awaiting measuring a bit is unable direct contact's apex angle, just at this moment can use the utility model provides a protractor is treated the angle measurement and is carried out indirect measurement, because it does not need and treats that the contact of goniometric apex angle just cango out the angle by indir