Additional District Judge I D Dubey awarded the punishment to the convict yesterday and imposed a fine of Rs 30,000 on him.
According to the prosecution, the convict shot his daughters aged seven, five and three years, who were playing outside their house in Nagla Deepa village in 2013.
When the mother attempted to save the girls, she was also shot at by the convict.
Assistant government counsel Virendra Lavania said two of the girls died on the spot, while the third succumbed to her injuries in the hospital.