Question

In the given figure angle ACD is exterior angle ACD =110 and angle A=30° then the measure of angle ABC is

Answer 1

the answer will be 80 degrees the measure of angle abc will be 80 degree as it is given that a CD is equal to 110 degree oecd is equal to sum of angle a and angle b so angle a that is 30 degree so 30 degree + angle b is equal to 110 degree then angle b is equal to 110 degree minus 30 degree that is equal to 80 degree