Question

pls answer this question

Answer 1

O is a centre of circle
CD is a diameter of circle
CD perpendicular AB
let centre of chord be E
CD perpendicular AB..............(given)
OE perpendicular AB.............(figure)
AE=BE ........................................(perpendicular
drawn from centre of
circle to a chord bisect
the chord).....(1)
In triangle AED and triangle BED
seg DE=seg DE...............................(common side)
angle DEA=angle DEB..................(seg OE
perpendicular
chord AB)
segAE=segBE................................(from 1)
triangle AED= triangle BED.......(from SAS test) AD=BD..............................(corresponding sides of
congruent triangle)

I hope this answer will help you