Question

if O is the centre of the circle find angle ACB ​

Answer 1

Angle ACB = 1/2 of angle AOB

[ANGLE AT THE CENTRE = 2(ANGLE SUSTENDED AT THE SURFACE )]

angle ACB = 1/2 (80)=40

Answer 2

Answer:

∠ACB = 40

Step-by-step explanation:

∠AOB = 80

BY degree measure theorem,

∠AOB = 2 ∠ACB

80 = 2 ∠ACB

∠ACB = 40