If their slopes are the same, the line are parallel, which means in number 3 and 5 the lines are parallel.
If one slope is the reciprocal of the other one with opposite sign, then they are perpendicular. Fir example lines with these slopes are perpendicular: 8/9 and -9/8
So, in number 4, 8 and 10 lines are perpendicular.
Answer:
x - y + 6 = 0
Step-by-step explanation:
In normal form of a straight line, the equation is given by
where p is the perpendicular distance of the line from the origin and
is the angle between the perpendicular line and the positive direction of the x-axis.
Here, in our case
and
Degree,
Therefore, the normal form of the straight line equation is
⇒
⇒
{Since, Cos (180 - Ф) = - Cos Ф and Sin (180 - Ф) = Sin Ф}
⇒
⇒ - x + y = 3√2 × √2 = 6
⇒ x - y + 6 = 0
So, the standard form of the equation is x - y + 6 = 0. (Answer)