Question

In the ab parallel to CD angle A equal to 90 degree angle is equal to 40 degree find angle find a CD angle

Answer 1

Step-by-step explanation:

In given figure AB=AC

In figure O is the center of circle and Point A,B,C and D on circumference of circle .

Then OA, OB ,OC and OD is the radius of circle

In ΔAOB and COD

AB=AC (given)

OA=OC (Radius)

OB=OD (Radius)

∴ΔAOB≅COD

∴∠AOB=∠COD=90

0

Given (∠AOB=90

0

)

Then (∠COD=90

0

)