Question

Does anyone know the answer?

Answer 1

Answer: (17/90)π radian

Step-by-step explanation:

Arc length of AC = radius × angle APC

angle APC = Arc length of AC / radius

angle APC = ((68/15)π / 12) radian

angle APC = (17/45)π radian

Now,

2 × Angle ABC = Angle APC

Angle ABC = Angle APC / 2

Angle ABC = (17/45)π / 2

Angle ABC = (17/90)π radian