Tell whether the ratios form a proportion.

Step-by-step explanation:

23 no

no the ration cannot form proportion because when the two values obtained after cross multiplication do not cancel each other

24 no

yes the ratios can form proportion because the two values obtained after cross multiplication cancels each other.

∠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°

there are no short passages to look at