Atriangular colourful scenery is made in a wall with sides 50 cm, 50 cm and 80 cm. a golden thread is to hang from the vertex so as to just reach the side 80 cm. how much length of golden thread is required ?

Which of these statements is correct? the system of linear equations 6x - 5y = 8 and 12x - 10y = 16 has no solution. the system of linear equations 7x + 2y = 6 and 14x + 4y = 16 has an infinite number of solutions. the system of linear equations 8x - 3y = 10 and 16x - 6y = 22 has no solution. the system of linear equations 9x + 6y = 14 and 18x + 12y = 26 has an infinite number of solutions.