Protractor capable of conveniently determining angles

Abstract

The invention provides a protractor capable of conveniently determining angles. According to the protractor, the center of an upper semicircular plate of the protractor and the center of a lower semicircular plate of the protractor are movably connected together through a hinge shaft. During use, a required angle can be determined from a gap portion through the cross adjustment of the upper and lower semicircular plates; due to a protractor structure that two 180-degree structures are combined, a proper angle is easier to adjust.

Description

technical field [0001] The invention relates to a protractor, in particular to a protractor for conveniently determining angles. Background technique [0002] The protractor is a special tool for measuring and determining angles. The traditional protractor is a semicircular plate, which can accurately measure and mark 180° through the angle marking. 0 However, when the traditional protractor is used for measurement and calculation, it is necessary to use a pen to determine the angle according to the mark. This traditional method is not only inconvenient to operate, but also directly affects the measurement speed. Contents of the invention [0003] The invention provides a protractor for conveniently determining angles, which can mark required angles conveniently and quickly. [0004] The present invention includes an upper half-circle plate and a lower half-circle plate of the protractor, and the adopted technical solution is: the centers of the upper half-circle plate an...

AI Technical Summary

Problems solved by technology

[0002] The protractor is a special tool for measuring and determining angles. The traditional protractor is a semicircular plate, which can accurately measure and mark 180° through the angle marking. 0 range of angles, but the traditional protractor needs to use a pen to determine the angle according to the mark when measuring and using it. This traditional method is not only inconvenient to operate, but also directly affects the speed of measurement.

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