Question

A,B,C are points on a line, with B between A and C. let m and N be the midpoints of AB and BC respectively. If AB : BC = 3:1 , What is AB: MN ?

Answer 1

Answer:

So let’s draw this, assuming the ratio of 3:1 is true in the simplest way: that AB = 3 and BC = 1.

Now add the midpoints in.

We already know AB = 3, now what’s MN? MN = 1.5 + .5 = 2, so the ratio of AB:MN is 3:2.