Point A lies between points B and C, with AB-12cm, CA-9cm.

Point A lies between points B and C, with AB-12cm, CA-9cm. Calculate the distance between. A) points B and C b) point B and the middle of the AC.

A) Point A divides the segment BC into segments AB and CA. Therefore, in order to find the length of the segment BC, it is necessary to add the segments AB and CA. We get:

BC = 12 + 9.

BC = 21 (cm).

B) To find the middle of the AC, you need to divide this segment in half:

9: 2 = 4.5.

Then the distance from B to the middle of the AC will be the length of the segment AB and half of the segment AC:

12 + 4.5 = 16.5 (cm).