Question

prove that if chords of congruent circles subtend equal angles at their centers then the chords are equal

Answer 1

Answer:

Step-by-step explanation:.

You can understand by this

Answer 2

given :two triangles in centre of circle

to prove:chord ab=chord cd

proof:in triangle aob and triangle cod

oa=oc [equal radius]

ob=od[equal radius]

angle aob and angle cod

by sas,

triangle aob is congruent to triangle cod

by cpct,chord b= chord cd

hence proved