Question

) Show that the lines x - 7y - 22 = 0,
3x + 4y + 9 = 0 and 7x + y - 54 = 0 form a
right-angled triangle,​

Answer 1

Step-by-step explanation:

The triangle with vertices A ( 2 , 7 ) B ( 4 , y ) C ( -2 , 6 ) is right angled at A if y =