# Writing convention in triangles

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In this new video I will explain what it is **the writing convention on triangles.**

The main points of a **geometric figure**, like the vertices of a polygon, are usually designated by uppercase Latin letters: ** TO**,

**,**

*B***.**

*C*A **triangle** it is then named like any other polygon, successively designating its vertices, for example ** ABC**. In the case of the triangle, the vertices can occur in any order, because any of the 6 possible ways (

**,**

*ABC***,**

*ACB***,**

*BAC***,**

*BCA***,**

*CAB***), corresponds to a tour of its perimeter. This is no longer true for polygons with more vertices.**

*CBA*The sides of the triangle are denoted, like all segments, by their ends: ** AB**,

**Y**

*BC***.**

*AC*To name the *length* On the one hand, the name of the opposite vertex is usually used, converted to Latin lowercase: **to** in order to ** BC**,

**b**in order to

**,**

*AC***c**in order to

**.**

*AB*The general notation for the angle between two segments ** OP** Y

**who share the end**

*OQ***. It is also possible to use a lowercase letter surmounted by a caret.**

*OR*In the video you can see graphically **the triangle writing convention**.

Also, if you want to practice what you learned in today's class, you can do the **printable exercises with their solutions** that I have left you on the web.