20 points! these need to be answered today, so . this could make or break my grade. answer all 3. i only have one shot at this so make sure the answers are correct.

Question 1)

Question 2)

Question 4)

Step-by-step explanation:

Question 1) we know that

The measure of the interior angle is the semi-sum of the arcs comprising it and its opposite

so

In this problem

substitute the values and solve for x

Question 2) we know that

The measurement of the external angle is the semi-difference of the arcs it comprises

so

in this problem

solve for x

Question 4) we know that

The measurement of the external angle is the semi-difference of the arcs it comprises

so

in this problem

solve for x

Find the measure of arc BD

there are no multiple choices