posted by obaji on .
A chord is 2cm from the centre of a circle. if the ratius of the circle is 5cm, find the length of the chord
Draw a diagram, including the radii to the ends of the chord. Draw the radius perpendicular to the chord. You now have two right triangles with one leg=1 and hypotenuse=5. Half the length of the chord is √24.
Err, I mean one leg=2. So half the chord has length √21
solve find the radius of a circle .if a chord 24cm long is 5cm distant from the centre