A farmer has a field in the shape of trapezium whose map with scale 1 cm = 20 m is given below :
The field is divided into four parts by joining the opposite vertices .

Based on the above information , answer any four of the following questions :
If the ratio of areas of two similar triangles AOB and COD is 1:4 , then which of the following statements is true ?

Options

A. The ratio of the their perimeters is 3:4
B. The corresponding altitudes have a ratio 1:2
C. The medians have a ratio 1 : 4
D. The angle bisectors have a ratio `1:16`