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## Homework Statement

Find the length of the chord which the circle 3x^2+3y^2-29x-19y+56=0 cuts off from the straight line x-y+2+=0. Find the equation of the circle with this chord as diameter

## Homework Equations

x^2+y^2+2gx+2fy+c=0

## The Attempt at a Solution

I can solve the second part of the question very easily. What I am really finding difficult is trying to construct a method of calculating the length of the chord. Is there any formula or equation for it????