Question

If R, S, and T are collinear and RS + ST = RT, which of the following is true?

A.T is between R and S.
B,RS = RT
C.S is the midpoint of .
D.S is between R and T.

Answer 1

What do you think?

Answer 2

c.

Answer 3

Well, c is not complete, but I'm assuming it should say "S is the midpoint of RT". So what if the situation looks like this?

Answer 4

Then R, S, and T are collinear and RS + ST = RT, but it's clear that S is not the midpoint.

Answer 5

thanks deb so it must be D.

Answer 6

Yeah, I think so. :) Remember, if you can think of a SINGLE counter-example to a general statement, then it isn't true in general. :)

Answer 7

can you answer this too??

Which of these are undefined terms?
point
segment
plane
angle

Answer 8

Hmmmm.... I'm not really sure. My intuition tells me one over the other 3, but I'm not completely sure what the question is getting at.

What do you think it is?