Question

1)the area of atriangle with vertices (a,b+c), (b,c+a) and (c,a+b) is what? 2)the point which lies on a circle with radius 6 and centre C(3,5) is a)(2,4) b)(3,4) c)(-3,5) d)(-2,4). the perpendicular bisector of the line segment joining the points a(1,5) and B(4,6) cuts the y-axis at what?

Answer 1

1)area of triangle=1/2 {a (c+a-a-b)+b (a+b-b-c)+c (b+c-c-a)}=1/2 {ac-ab+ab-bc+bc--ac}=0
2) equation of circle=>(x-3)^2+(y-5)^2=6^2
now check putting by all point which is satisfy so, answer (-3,5)