Question

If the segment joining the points (a, b) and (c, d) subtends a right angle at the origin, then
(a) ac – bd = 0
(b) ac + bd = 0
(c) ab + cd = 0
(d) ab – cd= 0​

Answer 1

If the segment joining the points (a, b) and (c, d) subtends a right angle at the origin, then

(c) ab + cd = 0

Answer 2

Answer:

ac+cd=0...................