Answer:
Part 1) The measure of the angle is 47°
Part 2) The measure of the angle is 52°
Explanation:
Part 1)
we know that
The inscribed angle is half that of the arc it comprises.
we have that
(12y-1)°=(9y+11)° ----> because the arc that the inscribed angles comprise is the same
Solve for y
12y-9y=11+1
3y=12
y=4°
Find the measure of the angle
(12y-1)°=12(4)-1=47°
Part 2)
we know that
The inscribed angle is half that of the arc it comprises.
we have that
2(3m+2)°=(4m+20)° ----> because the arc that the inscribed angles comprise is the same
Solve for m
6m+4=4m+20
6m-4m=20-4
2m=16
m=8
Find the measure of the angle
(4m+20)°=4(8)+20=52°