Ruler: A ruler is the most common measuring scale. The rulers are generally used in technical drawing, geometrical and engineering works. Commonly rulers are used for measuring distance and straight lines. The rulers are used for drawing straight lines. The most common use of the device is that the rulers are graduated in such a way so that it can easily measure certain things. Several other forms of rulers are also used for measuring length like the carpenter’s rule, the ribbon like tailor’s tape and the construction tape also known as tape measure. Several other forms of rulers like the golomb ruler, perfect ruler, measuring rod, tape measures, geometry template and others are frequently used. |