Easy question please answer mark you brainliest

1. find the area of the circle

area of a circle=200.96a^12

Step-by-step explanation:

area of circle=πr^2

=3.14*()^2

=3.14*64a^12

=200.96a^12

∠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°