Correct Answer : C
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, S1, S2, S3, ........, S7 in the circle such that their total area is (1/8)th of the area of the circle. Further, the area of the jth 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 S1 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?