8. 9. 10. A rectangle R with end points of one of its sides as (1, 2) and (3, 6) is inscribed in a circle. If the equation of a diameter of the circle is 2x - y + 4 = 0, then the area of R is.............. A circle of radius 2 unit passes through the vertex and the focus of the parabola y = 2x and touches the parabola y = 2x and touches the parabola y -8) is equal to.............. +a, where a > 0. Then (4a Le the mirror image of the point (a, b, c), with respect to the plane 3x-4y+ 12z+19 = 0 be (a-6, , y). If a+b+c=5, then 7-9y is equal to.............