Answer:

Explanation:
we know that
The inscribed angle is half that of the arc it comprises.
step 1
Find the measure of the arc PQR
![109^o=(1)/(2)[arc\ PQR]](https://img.qammunity.org/2021/formulas/mathematics/middle-school/w4p2nmq00ujr51e72xbt6vpgrn1y2gurph.png)

step 2
Find the measure of arc QR

we have


substitute


step 3
Find the measure of the arc QRF
![112^o=(1)/(2)[arc\ QRF]](https://img.qammunity.org/2021/formulas/mathematics/middle-school/i277bwz2k0xy9j06bjeio9ddtq5v6ur52x.png)

step 4
Find the measure of arc RF

we have


substitute

