Question

congruence of triangle​

Answer 1

Step-by-step explanation:

in AOC and DOB

angle C=angle B. (given)

OC=OB. (given)

angle AOC = angle DOB. (vertically opposite angle)

so. triangle AOC =~ triangle DOB

Answer 2

Answer:

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Step-by-step explanation:

In∆AOC and ∆DOB

angle ACO=angleDBO(given)

CO=BO(given)

angle AOC=angleBOC(Vertically opposite angles)

Hence,∆AOC≈∆DOB(by ASA rule)

Then,angle CAO=angleBDO(by cpct)

AO=DO(by cpct)

AC=DB(by cpct)