Question no 17 & 18

17 .       F i n d   t h e   a r e a   o f   t h e   q u a d r i l a t e r a l   w h o s e   v e r t i c e s   t a k e n   i n   o r d e r   a r e   A ( - 5 ,   - 3 ) ,   B ( - 4 ,   - 6 ) ,   C ( 2 ,   - 1 )   a n d   D ( 1 ,   2 ) . 18 .       F o r   w h a t   v a l u e   o f   k   t h e   p o i n t s   A ( 1 ,   5 ) ,   B ( k ,   1 )   a n d   C ( 4 ,   11 )   a r e   c o l l i n e a r ?

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