The distance between the points (a, −b) and (−a, −b) is
A
√2a
B
0
C
2a
D
√2(a + b)
Correct Option:
C
Explanation
Using the distance formula for (a, −b) and (−a, −b), d = √[(a − (−a))² + ((−b) − (−b))²] = √[(2a)²] = 2|a|. In the standard MCQ convention, a is taken as positive, so d = 2a. Therefore, option C is correct.
