Find all missing angles.

6.

m∠1 = 51°

m∠2 = 18°

m∠3 = 123°

m∠4 = 39°

7.

m∠1 = 51°

m∠2 = 34°

m∠3 = 95°

m∠4 = 38°

m∠5 = 47°

m∠6 = 74°

m∠7 = 59°

∠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°