In triangle abc (not shown), the measure of angle b is 3 times the measure of angle a, and the measure of angle c is 19 more than the measure of angle b. find angle a

I’m confused on how to work the pie charts

With these 5 geometry questions! pls 1.)quadrilateral abcd is inscribed in this circle.what is the measure of ∠a ? enter your answer in the box.°2.)quadrilateral abcd is inscribed in a circle.what is the measure of angle a? enter your answer in the box.m∠a= 3.)quadrilateral abcd is inscribed in this circle.what is the measure of angle b? enter your answer in the box.m∠b= °4.)quadrilateral abcd is inscribed in this circle.what is the measure of angle a? enter your answer in the box.°5.) quadrilateral abcd is inscribed in this circle.what is the measure of angle c? enter your answer in the box.°

Afair die is cast four times. calculate the probability of obtaining exactly two 6's round to the nearest tenth of a percent