In a trapezium, the diagonals \( AC \) and \( BD \) divide each other in the same ratio as the parallel sides.
Given \( AB : CD = 2 : 1 \), the diagonals \( AC \) and \( BD \) will divide each other in the same ratio.
Hence, the ratio of the areas of the triangles \( \triangle CPD \) and \( \triangle APB \) is also \( 1 : 4 \), because the area of a triangle is proportional to the base when the height is the same.
The correct answer is option (A): \(1:4\)
If \( \triangle ODC \sim \triangle OBA \) and \( \angle BOC = 125^\circ \), then \( \angle DOC = ? \)