Question

If RS=ST then point S is called the midpoint of RT.

Always.
Sometimes.
Never.

Answer 1

always is right

Explanation:

Answer 2

It's not stated if point S is on line RT. So it seems like the answer is "Sometimes". If the teacher tells you that point S is on line RT, then the answer will be "Always". This is because S divides RT into two parts RS and ST. Both of those parts are congruent.