Where do i find the answer to my question?

in app yo should collect some points by answering questions and ask questions

the answer is a

step-by-step explanation:

because your just changing the position of where the shape is

∠acb = 8°

step-by-step explanation:

∠xba lies on the circle and is half the measure of the intercepted arc ax

hence

measure of arc ax = 2 × 42° = 84°

∠acb is outside the circle and is

∠acb = (arcab - arcax ), hence

∠acb = 0.5 (100 - 84) = 0.5 × 16° = 8°