Respuesta :

The first two (top two) choices should be selected. The midpoint of a line segment divides the line segment into two congruent parts, so the first is true by the definition of midpoint. The whole is the sum of its parts; Adding the two smaller segments will always equal the whole.

Answer:

The correct options are 1 and 2.

Step-by-step explanation:

Given information: A is the midpoint of SM.

It means point A divides the line segment SM in 2 equal parts.

[tex]\overline {SA}=\overline{AM}[/tex]

From the given figure it is clear that the point S,A and M are collinear because they lie on a straight line. Using addition of segments we get

[tex]\overline {SA}+\overline{AM}=\overline{SM}[/tex]

Since [tex]\overline {SA}=\overline{AM}[/tex] and [tex]\overline {SA}+\overline{AM}=\overline{SM}[/tex] are true. Therefore the correct options are 1 and 2.