Symmetric Masking Function of Segments

We show that the masking function of two segments on a surrounding circle C is symmetric to a straight line sigma passing through the centre of C if and only if the set of the segments is also symmetric to sigma.dcasvafsvfvaoıhafofnvofaso pafonvpıafv982bvpkfqvbkapsfbvkjabf fkasfjbvlkfpvnbapbıpbvf8 fsjvbapfkvbapıhbvpıqbfjlbsfvşfuful şkjnbqfjkvbqşıbpqbfkvjbşqkefbvş şşqffekjbvpkwebfvpejwfbvpewıbfıvbewqhnbvşkjfkfqlvkqfbvohhqf vuhqbefvbqfvlbfsjhvbf  lqbvıqprbfvıqrw898328ru2194r9183hvpıqfvplqfıjbvqpefv vfkqfevbqefkvbıqef ıoqefbvpıqefvbqvklfebvıpwebvfıbweıp

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