definition

☼ Concurrent lines :-    If three or more distinct coplanar lines pass through a single common point, they are said to be concurrent lines and that point is called their point of concurrence.
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☼    LINES   ☼

☼ Cramer’s  Rules  :  

  If  l₁  :  a₁x   +  b₁y  +  c₁  =  0

and  l₂ :   a₂

☼ Perpendicular Distance ( p ) :–

 (i) If  P (x₁, y₁) is a point outside a line ax + by + c = 0, then perpendicular distance from P to line is,

p  =  PM  …

☼ Intercepts and Slope of  the standard equation :–

           If  AB  :  ax + by + c  =  0 intersects X – axis and Y – axis respectively at A and B, then