Question

in the given figure if o is the centre of the circle then measure of angle ACB is​

Answer 1

Answer:

angle ACB = 40°

Step-by-step explanation:

angle ACB = 1/2 AOB

( angle at the circumference of the circle by same arc)

angle ACB = 80°/2 =40°

Hope it helps u

Answer 2

Answer:

The measure of the angle ACB = 40°

Step-by-step explanation:

Given that O is the center of the circle

from figure the measure of the arc AB, ∠AOB = 80°

here we need to find ∠ACB  

In a circle the angle at center which is subtended by an arc is double to the angle subtended by same arc at any point on the circumference of circle  

⇒   ∠ AOB = 2 ∠ ACB

⇒  ∠ ACB = ∠AOB / 2    

⇒ ∠ACB = 80°/2    

⇒ ∠ ACB =40°