Answer
arc AB=90$^{\circ}$
arc CD=40$^{\circ}$
Work Step by Step
AB-CD=2m$\angle$P
AB=50+CD
AB+CD=130
CD=130-AB
CD=130-(50+CD)
CD=80-CD
2CD=80
CD=40$^{\circ}$
AB=50+CD
AB=90$^{\circ}$
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