Question

Hello, Yesterday I had an exam and I did a mistake. I want to know how many marks would be deducted:
Q. In a parallelogram ABCD, E and F are the midpoints of sides AB and CD respectively. Show that the line segment AF and EC trisect the diagonal BD.
In this question, I forgot to proove AECF a parallelogram i.e. AF II EC. However, I did the rest of the answer correct (by converse of midpoint theorem,etc).

(It was for 3 marks and Class 9)
Please tell me how many marks would be deducted.

Answer 1

Answer:

According to me,

1-1½ mark would be deducted