The condition that two lines are perpendicular to each other is - - Vidyadip

MCQ

The condition that two lines are perpendicular to each other is -

✓
$a_1 a_2+b_1 b_2+c_1 c_2=0$
B
$a_1 a_2+b_1 b_2+c_1 c_2=1$
C
$a_1 a_2+b_1 b_2+c_1 c_2=-1$
D
$a_1 a_2$ $b_1 b_2$ $c_1 c_2=0$

✓

Answer

Correct option: A.

$a_1 a_2+b_1 b_2+c_1 c_2=0$

A

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