Correct Answer : C

## Realated Questions

ABCD is a rhombus with the diagonals AC and BD intersecting at the origin on the x - y plane. The equation of the straight line AD is x + y = 1. What is the equation of BC?

Consider a circle with unit radius. There are 7 adjacent sectors, S

_{1}, S_{2}, S_{3}, ........, S_{7}in the circle such that their total area is (1/8)^{th}of the area of the circle. Further, the area of the j^{th}sector is twice that of the (j-1)^{th}sector, for j = 2, .........., 7. What is the angle, in radians, subtended by the arc of S_{1}at the centre of the circle?In triangle DEF shown below, points A, B, and C are taken on DE, DF and EF respectively such that EC = AC and CF = BC. If angle D = 40 degrees, then what is angle ACB in degrees?