Question

The length of segment AC is 78 millimeters, if BC is 29 millimeters, then what is the length of segment AB?

Answer 1

if the hole segment is 78 and some of it is 29 millimeters, you subtract 78-29= 49 which means segment AB is 49 millimeters

Answer 2

I am going to assume that B is between A and C.

AB + BC = AC segment addition postulate

AB + 29 = 78 substitution

AB = 49 subtraction property (subtracted 29)

Answer: 49 mm