Which of the following Instruments is used for constructing angles and bisecting lines? Ruler Protractor Set square

The correct answer is: Protractor.<br /><br />A protractor is a circular or semi-circular instrument used for measuring and constructing angles. It typically has a scale marked with degrees, allowing users to measure angles accurately. Additionally, protractors can be used to bisect lines, which means dividing a line into two equal parts. While rulers and set squares are also useful tools for geometric constructions, they do not have the specific features required for measuring angles and bisecting lines as effectively as a protractor.