formula for producing a point on a perpendicular bisector

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[deep perch]

@red basin help the man

[red basin]

@marsh jackal yes

so basically

you are asking

if there's a formula for a line that's perpendicular to a given line.

hes it's the same line but just make the slope m -> -1/m

you can

[red basin]

for that use this

plot these 2 lines

ax+by+c=0
bx-ay+d=0

you'll see

it turns it 90 degrees

and you can move it around