ANSWER
The name of the segment inside the triangle is
![altitude.](https://img.qammunity.org/2019/formulas/mathematics/high-school/j5cwbnrx39fir53glmxpnx2wrseoj8fuxu.png)
Step-by-step explanation
The segment inside the large triangle is a line from one vertex of the large triangle that meets the the opposite side of the large triangle at right angle.
Any line from one vertex of a triangle that meets the side opposite to that vertex at right angle is referred to as the
![<b>altitude</b>](https://img.qammunity.org/2019/formulas/mathematics/high-school/4oy2vyuhvwexaz4f4tqa50bh89s20hb3av.png)
of the triangle.
Sometimes the altitude may fall outside the triangle.
Therefore the correct answer is option 2.