Segment AB is 3 units long
Segment AC is 5 units long
Segment AD is 8 units long
Segment BD is 5 units long
Segment CD is 3 units long
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To find the length of the segment, you are finding the distance between the two endpoints. On a number line, distance is simply found through subtraction and making the result positive. Point A is at -5 while point B is at -2. Subtract these values to get -5 - (-2) = -5+2 = -3 and make the result positive to get 3. So the distance from A to B is 3 units, which is the same as saying "segment AB is 3 units long"
Segment AC is 5 units long because A-C = 5-0 = 5
Segment AD is 8 units long since A-D = -5-3 = -8 which turns positive into 8
Segment BD is 5 units long because B-D = -2-3 = -5 which becomes 5
Segment CD is 3 units long because C - D = 0-3 = -3 which turns into 3
Note: An alternative to subtraction is to count out the spaces between each number on the number line.
