Yes, I have seen ladies winnow grain in my village. People winnow grains to remove straws, chaff and dust found in grains there. It is called ‘Barsana’
In Fig. 9.26, A, B, C and D are four points on a circle. AC and BD intersect at a point E such that ∠ BEC = 130° and ∠ ECD = 20°. Find ∠ BAC.