Thread: find the radius with bisected chord

Find the radius of a circle with center at (4,1), if a chord of length 4 sqrt 2 is bisected at (7,4)

Originally Posted by aeroflix

Find the radius of a circle with center at (4,1), if a chord of length 4 sqrt 2 is bisected at (7,4)

start by making a sketch.

draw a segment from the circle's center to the point of bisection ... use the distance formula to find the length of this segment.

draw a radius from the center to one of the chord's endpoints.

you should now have a right triangle ... radius is the hypotenuse.

You have two of the three sides ... use Pythagoras.