Condition for the parallelism of two lines.

Condition for Perpendicularity of two lines.

Condition of coplanarity of two lines and equation of the plane containing them

Condition of parallel and perpendicular lines

Two lines that are respectively parallel to two intersecting lines intersect each other...True or False

State the condition for resonance in a parallel resonance circuit.

Two distinct intersecting lines cannot be parallel to the same line.

Condition of line to be parallel perpendicular and intersecting

Can you find whether the lines EF , GH , KP , AB and CD are parallel or not by using other conditions of parallel lines ?

Under what condition will the angle between two regression lines become zero?