Question

What is the difference bn Segment CD and CD?​

Answer 1

Sometimes, the symbol – written on top of two letters is used to denote the segment. This is line segment CD (Figure 1 ). Figure 1 Line segment. It is written CD (Technically, CD refers to the points C and D and all the points between them, and CD without the refers to the distance from C to D.)

Explanation:

Sometimes, the symbol – written on top of two letters is used to denote the segment. This is line segment CD (Figure 1 ). Figure 1 Line segment. It is written CD (Technically, CD refers to the points C and D and all the points between them, and CD without the refers to the distance from C to D.)

Answer 2

Segment CD and CD are different description of the line segment between points C and D.

By default CD refers to line segment but it could also refer to arc in the circle or a ray.

Therefore it is always good to mention by words or notation what is it.