Question

Q5. The coordinates of A and B on a number line are -7 and 9. The coordinates

of C and D on a number line -4 and 12. Are AB and CD congruent? If yes, what
is the length of each segment?

Answer 1

• are congruent
• length: 16 units

Explanation:

The length of a segment on a number line is the difference of its coordinates.

AB = 9 -(-7) = 16

CD = 12 -(-4) = 16

AB and CD both have a length of 16 units, so are congruent.