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PO = RO (radius)
there for POR is an  isosceles triangle
RPO= 35
∠ORP+∠RPO+∠POR =180° (angle sum prop)
35°+35°+∠POR          =180°
               ∠POR          =180-70
∠POR+∠ROQ =180° (supplementary angles)
           ∠ROQ  =180-110