A ruler is a tool that helps draw straight lines.
Rule is a term that derives from the Latin language ( regula ) and has multiple uses. It can be a tool made of a solid material that allows you to make measurements or draw a straight line .
For example: «Can I borrow your ruler? I had forgotten that today we had a technical drawing» , «I'm going to need a ruler to measure the space left between the two pieces of furniture» , «I suggest using a ruler if you don't want the graph to turn out crooked» .
Using a ruler
The use of the ruler extends to various activities and branches of study, such as printing, geometry, engineering and technical drawing .
In addition, it exists in various shapes, materials and sizes; Among other types, it is possible to find: the desk ruler (the most common, used especially in school); line indicators (used by printers and marked with points, inches, agates, and spades); protractor (used for measuring angles and circles).
When making a technical drawing, the ruler is usually very useful.
Precepts and norms
Rules, on the other hand, are regulations or precepts that must be respected. The usual thing is that the rules arise from an agreement or convention and that, once established, they are mandatory: «The sanction is correct since the player touched the ball with his hand and, therefore, violated an essential rule of this game" , "How do you think of coming dressed like this? Have you not read the dress code of this company? , "The contest rule indicates that it is prohibited to submit handwritten works."
Rules can be understood as indications that indicate the way in which something should be developed. Games and sports , in this sense, have rules that participants must respect; Otherwise, they will be sanctioned by the referee or judge. If a basketball player kicks the ball, he has violated a rule of his sport.
Board games , very popular in the era before video games although even today they have a place in the hearts of many people, usually come with a booklet with the rules, or display them printed on the back of the cover. The same can happen with products in optical formats (CD, DVD), but nowadays it is increasingly common for instructions to be distributed digitally, saving production costs and reducing the impact on the environment for each copy.
A rule can also be a principle or a symbolic order : "Guests must not bring anything: it is a rule of this house" , "If we are going to live together, we will have to respect certain rules of coexistence" .
Spelling rules
A series of guidelines that serve to remember the correct form of words in a language, as far as writing is concerned, are known as spelling rules . Its greatest usefulness lies in the fact that it allows a text to be understood by all people who speak the same language. Nowadays, more and more countries denounce the little attention that young people pay to these rules, which has an impact on the quality of communication.
Not every spelling rule is mandatory , as is the case with the use of the letter m in front of b ( n and b or m and v should never be grouped together); In some cases, the rules offer guidance based on statistics, as can be seen where they point out that verbs that end in a syllable that sounds "ger" are usually written with g instead of j ( tejer is an exception, although There are many examples that support it, such as shrink , protect , catch , emerge and converge ).
menstruation
Menstruation is also known as a period. In this case, the notion is associated with a natural thing that happens with an order that does not vary.
"I think I'd better stay home: I'm on my period and I don't feel very well" is an expression where the concept is used with this meaning.