there is a sector oap of a circle with centre o, containing angle θ ab is perpendicular to the - Maths - Circles

Question

there is a sector oap of a circle with centre o, containing angle
θ ab is perpendicular to the radius oa and meets op produced
at b prove that the perimeter of shaded region is r[tanθ
+secθ+ pie thitha/180 - 1]

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there is a sector oap of a circle with centre o, containing angle θ. ab is perpendicular to the radius oa and meets op produced at b. prove that the perimeter of shaded region is r[tanθ +secθ+ pie thitha/180 - 1]