ca: REGLA GRADUADA
es: REGLA GRADUADA
Ruler is a strip of wood, metal or plastic with straight edges that are usually marked with whole and fractional units of length, inches, centimeters or both and used to draw straight lines and measure lengths. Rulers are made in different lengths, from ten centimeters to five meters and in one piece or many pieces hinged together to fold up. The illustrations show three types.
a) The ruler is 1 meter long and in four sections of 25 cm.
b) One side section of a) opened to show the center disk. It can be opened to a180º and each of the two sections on the left and right are connected and are opened by a hinge,.
c) Metal ruler.
d) Plastic ruler.
Note: When made in a pliable material that can be bent and rolled up, it is known as tape measure.