Perpendicular - often a figuring word, whose value many is not quite well understood. This mini-article Tell about the essence of the perpendicular.
What is perpendicular
Speaking with simple words, perpendicular is a straight line that makes an angle of 90 with another line. The concept of perpendicular is often used in geometry. Often you can hear a sentence similar to this: "Perpendicular, conducted on the base of the triangle, divides a large triangle into two small. Find ... ", etc. For example, you can consider a rectangular triangle where there are two categories. (a and B. ) and hypotenuse C.
In such a triangle:
- Catat A perpendicular to cathetu B, because injection Between them is 90.
- Catat b perpendicular to cathetu A, because injection Between them is 90.
In addition to geometry, this word can be used in different life situations. For example, if One road crosses another so that the angle is 90, we can say that they are perpendicular to each other.
From the above examples, you can withdraw a general rule: if two planes are intersection Make up 90, they are perpendicular to each other.
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