Quadrilateral PQRS is located on the coordinate plane. The lengths and slopes of the sides have been calculated. Segment PQ d equals the square root of the quantity 1 minus 0 end quantity squared plus the quantity 2 minus 0 end quantity squared end root equals the square root of the quantity 1 plus 4 end quantity equals the square root of 5 m equals the quantity of 2 minus 0 end quantity over the quantity of 1 minus 0 end quantity equals 2 Segment QR d equals the square root of the quantity 5 minus 1 end quantity squared plus the quantity 0 minus 2 end quantity squared end root equals the square root of the quantity 16 plus 4 end quantity equals the square root of 20 m equals the quantity of 0 minus 2 end quantity over the quantity of 5 minus 1 end quantity equals negative one half Segment RS d equals the square root of the quantity 4 minus 5 end quantity squared plus the quantity negative 2 minus 0 end quantity squared end root equals the square root of the quantity 1 plus 4 end quantity equals the square root of 5 m equals the quantity of negative 2 minus 0 end quantity over the quantity of 4 minus 5 end quantity equals 2 Segment SP d equals the square root of the quantity 0 minus 4 end quantity squared plus the quantity 0 minus negative 2 end quantity squared end root equals the square root of the quantity 16 plus 4 end quantity equals the square root of f20 m equals the quantity of 0 minus negative 2 end quantity over the quantity of 0 minus 4 end quantity equals negative one half What is the best classification for quadrilateral PQRS?