The area of a parallelogram formed by the lines `a x+-b y+-c=0` is (a)`(c^2)/((a b))` (b) `(2c^2)/((a b))` (c)`(c^2)/(2a b)` (d) none of these

Area of the rhombus formed by the lines ax +- by +- c = 0 is (A) 2c^2/|ab| (B) |ab|/2c^2 (C) c^2/|ab| (D) |ab|/c^2

The area of the triangle formed by (a,b+c),(b,c+a) and (c,a+b) is a+b+c( b) abc(a+b+c)^(2)(d)0

The value of c for which the equation a x^2+2b x+c=0 has equal roots is (b^2)/a (b) (b^2)/(4a) (c) (a^2)/b (d) (a^2)/(4b)

If a+b+c=0 , find the value of (a^2)/((a^2-b c))+(b^2)/((b^2-c a))+(c^2)/((c^2-a b)) (a) 0 (b) 1 (c) 2 (d) 4

If a,b,c are in proportion,then a^(2)=bc(b)b^(2)=ac(c)c^(2)=ab(d) None of these

Show that the area of the quadrilateral formed by the common tangents to the circle x^(2)+y^(2)=c^(2) an the ellipse (x^(2))/(a^(2))+(y^(2))/(b^(2))=1,b

In Fig.40, A B C D is a parallelogram of area 144 c m^2, the value of x is 8 (b) 6 (c) 9 (d) 10

If the quadrilateral formed by the lines ax+by+c=0,a'x+b'y+c=0,ax+by+c'=0,a'x+b'y+c'=0 has perpendicular diagonals,then (a)b^(2)+c^(2)=b^(prime2)+c^(2)(b)c^(2)+a^(2)=c^(2)+a^(prime2)(c)a^(2)+b^(2)=a^(2)=a^(2)+b^(2)(d) none of these