1.

Radius of a circle is 5 cm. the leghth of chord is 8cm find the distance of chord from the centre

Answer» LET O be the centre of the circle and AB be the chord.
Join OA.
Draw OC PERPENDICULAR to AB.

AC=1/2AB (Perpendicular from the centre bisects the chord)
     = 4 cm
OA=5 cm (Radius)

Triangle OCA is RIGHT angled,
... OC​2 =OA​2 - AC2 (Pythagoras Theorem)
            =52 - 42
             =25 - 16
             =9
 ...   OC= 3cm
 



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